When a man stretches his sack out as to apply it to another man or woman's face sufficient enough to tighten up and drag the other said individual across said floor....
The manly problem whereby sitting while wearing constrictive pants may cause your scrotal sac to become uncomfortably pinched between your thigh & underwear. Especially on warm days.
"Have a seat, Dave!"
"Thanks! You know, I... *sits* Ooh! - Sacktrap!"
Stretching out ones sack to the maximum pliability, then wrapping saidsack over a persons face and dragging them across the carpet. Usually executed when the targeted individual is acting out and misbehaving.
Karen was acting out tonight because she was lacking Gary’s full attention. A quick SackWrap was required to get her back in line.