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1.
Although not actually of the ape family, stomach monkeys are to blame for practically all digestive system ailments in human beings when an actual condition cannot be identified.
Borgy is throwing up again. I guess he's got a case of the stomach monkeys.
by Sweet Louis June 12, 2008
 
2.
A group of men united in a common goal of overcoming all odds no matter how great, usually on a softball field.
As Hollywood rounded third and headed home, the Cowboys could only watch, for this day belonged to the Stomach Monkeys.
by Sweet Louis June 12, 2008