I've been chasing my tail about that one. Bet you're right. = I have been going around in circles, I don't know the answer
don't even wanna take a wild guess? = do you want to guess?
they're making a grab, I hear = they are trying for it
so, uh, you gonna hook me up? = will you give it to me?
no kidding? I'll take you up on that, for sure! = I don't believe you, I am calling your bluff