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I've got million of those slangs.

anmachen - to flirt
anschaffen - to whore
Arsch - a**
Arschloch - a*****e
bollern - to ******** - to ******** - "to nail," non-offensive and funny way to say 'to ******** - "to play the organ," also means 'to ******** - to ******** - to ******** - to ******** - to ******** - to ******** - to ******** - to ******** - to ******** (my my, there are a lot of these)
Arschficken - to anally ******** - to rat out, give away (lit. to s**t on)
sheißen - to s**t
kacken - to s**t
Scheiße - s**t
Scheit - crap
Arschlecker - a** licker
baggern - to approach (as a member of the opposite sex with sexual intentions)
Bert - complete idiot
beschissen - shitty, very poor quality
Beule - erection, boner
Ständer - erection, boner
Bierficker - "beer ********," more accurately one whose p***s is small enough to fit into a beer bottle
blasen - to blow (more at b*****b)
Braut - literally bride, used to refer to nice girls
Bumsbomber/Bumsenbomber - "********" used to refer to 'tourists' who are really there to fulfill sexual fantasies with foreigners
Busengrapscher - "tit-toucher," referring to one who comes up to a woman (usually from behind) and grabs her breasts
dicke Eier haben - literally "to have big testes," means to be very horny
dummschwallen - to talk nonsense
lallen - to mumble drunkenly
Dumpfbacke - dimwit, boring person
Fischkopf - lit. "fish-head," someone from the northern provinces of Germany
Flocken - money
Fünf gegen einen - "five against one," term for masturbation (more generally male masturbation)
furzen - to fart
Gebabbel - nonsense, stupid talk
Geschwalle - nonsense, stupid talk
Gesülze - nonsense, stupid talk
geil - lecherous, horny -- also used as a general adjective for positive sentiments toward a person, place or thing (ein geiles Mädchen - a nice girl OR a horny girl eek )
Göbelmasse - alcoholic drinks
göbeln - to puke
Grapschen!!! - shouted when one is being molested or sexually violated (like American "Fresh!!!")
Hosenscheisser - one who shits his pants
Hure - whore
Huresohn - son of a whore
Ische - usually describes ones girlfriend ("meine Ische...") - slang, but not insulting except for feminists
Jabolo - harmless insult of a name for informal greetings
Kiste - tits
Kitzler - clitoris
kiffen - to smoke marijuana
Kennsch de Wayne?/Wayne intressiert's? - equivalent to "Who the ******** cares?"
Klo - mens room, the can
Klugscheißer - lit. "Smart shitter," smartass
kotzen - to puke
krank - lit. "sick," describes a woman on her period
Krumbaschniedschie - German potato pancake (Trier slang)
kübeln - to puke
Latte - erection, boner
Lappen - lit. "cloth," refers to driver's liscence
Leck mich am Arsch/Leck' mich - lit. "lick my a**"
Mäuse - "mice," common slang for money
Moese(Möse?) - v****a
Möpse - female breasts
Nutte - whore
Ödbacke - boring person
Pappnase - detrimental person
Patte - very common slang for money
Pimmel - p***s
Poppstar - popstar, but when connotated with 'poppen' gives a "pornstar" effect
Puderdose - p***y
Rottler - wanker
runterholen, sich einen - to masturbate
Sack - testicles, balls
Scheißhaus - lit. "shithouse" - toilet
Schlampe - slut
Schlampenschlepper - a pimp's car, lit. "slut-dragger"
Schniedel - funny expression for p***s, like 'wang'
Schnitte - chick, babe
Schnittenalarm! - Babe alert!
schrullen wie's Tier - to pee like an animal
Schwaadlappen - one who seems to talk endlessly
Schwengel - d**k
Schwanz - d**k, lit. "tail"
Schwanzlutscher - cocksucker
Steifer - erection, boner
pissen - to piss
strullen - funny way to say 'to piss,' like whizz, tinkle or leak
schwul - gay
geile Tussi - good-looking young lady
Teute - a joint
verdammter Schweinehund - an absolute moron
Verpisse dich! - Piss off!/Go away!
wegflexen - to knock someone over, flatten
wichsen - to masturbate
wie's Tier - like an animal - very popular way in southwest Germany to emphasize what you say
b*****d - b*****d
Wichser - masturbator, wanker
Wo hockt der Bus? - Who the ******** cares? lit. "where squats the bus?"
Muschi - most common term for p***y (vulva)
Dirne - prostitute
Zwitter - hermaphrodite
Miststück - b***h, lit. "manure piece"
Zuhälter - pimp

Er, not that I'm a totally profane person, I don't wanna give that impression. I just happen to know these words.

Ich verstehe ein bissien Deutch, abba I can't read or write it.

Meine froynd ist von Berline, und wir sprechen ein par Deutsche when we are allein

*edit*
To all German speakers out there, sorry for butchering your language sad

He even added some dialects....
and there were (almost) no spelling errors.

I wish I knew how to speak German!!!! gonk