Make a crack about means to laugh at or make fun of something that is interesting or tell a joke on someone
From Family Guy Seaonn 2 Eposide 2
superman: I killed a hooker. She made a crack about me being faster than a speeding bullet.

I just met this girl yesterday who thinks she's hot, but a lot of my friends make a crack about her being such a butterface
by Rayne_MK January 30, 2011
Get the make a crack about mug.
Calling someone a name and/or insulting them, then quickly turning your back to your victim so they cannot reply.
Make a crack and turn your back

Person 1: You are retarted (quickly turns away).
Victim: Damn it. Now he is occupied with something else so I cannot reply.
by HAHAHAHAH1AHAHAHAHAHA April 26, 2011
Get the Make a Crack and Turn Your Back mug.