S.H.I.T.

A guy walks into a bar, puts his pet rabbit up on the mahogany, and starts drinking. While he's drinking, the rabbit starts doing little rabbit pellets on the bar. After a while, he leaves, and another guy, a real loudmouth, walks in.

He says, "Hey, barkeep, give me a drink for me, a drink for you, what do you say, there's nothing to do." He has a few drinks, and the whole time he's running his mouth, annoying the bartender. Finally, he spots the rabbit pellets.

He says, "Hey, barkeep, what are these?"
The bartender says, "They're smart pills."
The loudmouth says, "Can I try a few?" The bartender says, "Knock yourself out."
The guy pops a few in his mouth, chews for a while, then spits them out and exclaims, "Yuck! These taste like shit!"
The bartender says, "You're getting smarter already."