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Lacking courage, or bravery. Also lacking male instincts, knowledge or abilities to do stereotypical male activities.
I can't believe you didn't ask her out! You're dumb in the pants.

Calling a tow truck instead of changing a flat tire is dumb in the pants.

That guy can only bench 20 lbs..He's so dumb in the pants.
by AB00013 April 18, 2010
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