Extra room in a pair of pants to accomodate an enormous penis.
Mary: Hey Sue, check out Joe, he looks different.

Sue: That's because he has leg room in those pants. You can't see the bulge from his enormous penis.

Mary: I pefer his skinny jeans
by Hardoneous Maximus May 19, 2011
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The volume of fat in your thighs and lower leg flab
Do you see that lady little Timmy?

DAMN!! LOOK AT THAT LEG ROOM!!
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