2-Expressing one's feeling for someone telling a lie about a certain event, like running out of beer.
3-Taking notice of someone's ass, and thinking it is good, probably while you're under the infulence of beer.
Bob- I can't, Ben over there drank it all.
Bill-That's ass, Ben, WHY?
2-Bill-Yo, dude pass me another can.
Bob-I can't, Ben over there drank it all.
Ben-That's ass, why lie.
3-Bill-Hey dude, look at that ass there.
Bob-Now that's ass.
Ben-I want some.