Phrase invented by east coast rappers Mobb Deep to signify someone who acts hardcore until they actually have to deal with the reality of "the life of diamonds and guns". A coward who is shaken up by the harshness of innner city life.
"He ain't a crook, son. He just a shook one." - Mobb Deep
To do a sit-up with your eyes closed. Usually a prank in wich one party bets another party they cannot do a sit-up with their eyes closed. When the second party tries to complete this task the first party pulls down their pants and places their buttocks where the face of the second party will be upon completing the sit up. This always results in hilarity for the first party and a brown nose for the second.