FRAGGING?

"I'm so sore at that Sergeant Brooks with his familiarity angle," a GI complained. "He keeps sneaking up on me, slapping me on the chest and breaking the cigars in my pocket. I figured out how to teach him a lesson."

"Whatcha gonna do?" asked his friend.

"I'll fix him. The next time he slaps me on the chest I'll have a booby trap in my pocket."