YEAH RIGHT!
Made popular by the movie CLUELESS staring Alicia Silverstone.
Meaning: I'm definetly not going to do that / not into that/ don't beleive that / etc.
If a guy tells me he knows I'm in love with him (but I think he's a total loser), then I say to him "AS IF!"
Short for "as if that was true," "as if that would really happen," or "as if she'd really agree to that." Basically, it means it'll be a cold day in hell that the idea or event is true or ever will be. It's a hipper version of the 80's expression, "Yeah, right!"
Enriched after selling plasma, old impoverished Nathan approached young, smokin' hot Angela and asked her if she'd like to have dinner with him at the all-you-can-eat buffet: his treat. After throwing up a bit in her mouth, she rolled her beautiful blue eyes and blurted, "As if!"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.