clearing barrel

1) Barrel filled with sand placed on most U.S. military ranges and specifically near the armory. Used to clear out a weapon in an unknown condition. That way if a round is discharged it enters the sand and is stopped instead of entering your platoon mate.

2) A Company or platoon whore. A uniform chaser who is used by many of the men of one unit to clear their "personal issue."

a woman that is not pretty or sexy of any sort yet willing to have you clear yourself inside her