What a hot-in-da-crotch stud tells a hot chick whom he's inviting over to his residence for a wildly good time --- i.e., "your warm velvety squeezable posterior will be just as delightful to me regardless of what you're wearing; besides, any garments are gonna be coming off just as soon as you arrive here, anyway, and so it really doesn't matter what you have on at da moment, anyway." :P
Telling a gal to "come ass you are" may indeed put her at ease as far as wardrobe concerns, but it could also give her second thoughts about whether she wants to show up in da first place, since "jumping straight to fourth base" --- i.e., merely having you immediately rip off all her clothes and take a flying leap into bed with her --- might not be what she'd originally had in mind for said visit.
A phrase meaning that some serious ass is going to get whooped, more so than usual, because there's nothing else left to do that can solve the current problem. It also makes for a great entrance to a party.
The phrase originated from the 1988 John Carpenter film "They Live". The main character walks into a bank with a shotgun and says the line, then proceeds to shoot all the aliens-disguised-as-humans in it. And yes, it is as awesome as it sounds.
The phrase was also used in Duke Nukem 3D and a modified version was said in the 1993 film "Dazed And Confused", where a character says "I came here to drink beer and kick ass... and it looks like we're almost out of beer."
I have come here to chew bubblegum and kick ass... and I'm all out of bubblegum. Now let's get fucked up!
Expletive spoken as a tic from a citizen of South Park with tourette's syndrome. While other residents had boring tics like snapping their fingers and grimacing, this particular man shouts various combinations of "piss come from my ass" in succession.
"Hi how are... p-p-PISS come from my ASSSS!!! Piss... Ass. Piss COME from my ASS!!!!!!!!!! ahem. excuse me, I meant how are you doing? ASS PISS ASSSSSS!!!!"