Ma Deuce is on the Loose is military slang, for the effective use of a M-2 .50 heavy machine gun in combat.
The sappers try to cut the perimeter wire, but they get cut down when Ma Deuce is on the Loose!
by I, Wreckerrr October 13, 2016
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A turd that is anywhere except for in the toilet or in a person.
1.

Man! I need to get home quick or I'm going to have a Deuce on the loose!

2.

first guy: Don't go into the second toilet stall, there's a couple deuces on the loose.

second guy: Aww dude! Nasty! Where?

first guy: One on the floor and one on the toilet seat.
by CrazyAndyD October 20, 2012
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I had a dozen tacos for lunch and the the deuce was loose about hour later. Or, when you feel a huge crap coming on, you say "The deuce is loose!"
by Sir_Poopsalot November 20, 2013
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