here are a few more offerings, some more original than others; a few of these originated from Hawaiian friends, so they may just be pidgin; in addition, the example quotes are paraphrased from real conversations:
bullhell: the same as "bullshit" basically, used as a noun; as in "She told me a bunch of bullhell about not being contagious."
dude: adjective for describing a mannish woman; as in "German women are really dude, man."
kicked: adjective for describing a very ugly woman; derived from the idea that a woman that ugly had to have been kicked in the face at some point, or at least looks as if she has; as in "No, I'm not going to ask her out, because she's hella kicked." Can be emphasized as "superkicked."
hit it: verb meaning to have sex; as in "He's going to be late for dinner because he's probably over at his girlfriend's house hitting it with her."
dick: adjective to describe the actions of someone who's being a dick; as in "Come on, that's totally dick." Can be shortened to just "D," as in the letter, e.g. "Yo, that's D."
the beej: noun meaning fellatio. pronounced "BEE-juh", as in "His girlfriend gives him the beej whenever he wants it, so of course he's going to hang onto her."
that is fuck: phrase meaning that something is pretty messed up in a bad way, as in "I can't believe she says I'm shallow. That is fuck."
like breed: phrase meaning the equivalent of "Get a room"; usually used when two people are hanging off each other, as in "Look at them. Like breed, already, you two."