Mom's minivan

Related to the shocker, (two in the pink, one in the stink), Mom's minivan is performed with two fingers in the "pink" and a fist in the "stink."

Lady: Wanna do something special tonight, sweetie?
Lady's Partner: Sure honey! Would you like to try out Mom's minivan?
Lady: Golly, that sounds swell! Why would an act be called such a silly thing, though?
Lady's Partner: You know...two in the front, FIVE IN THE BACK!!!

To buy my mom a minivan

A phrase used to get out of an obligation. Whether it be money, for trade, or just a lame excuse not to follow thru with prior agreement.

Mike: "Hey doesn't Bob owe you money?"

Me: "yes he does!"
Me: "Hey Bob! How about paying me back and making it right? Huh?
Bob: " I can't be bothered with that right now man, Im off to buy my mom a minivan! *Scurries off shamefully*