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1.
The part of your pants or shorts around the crotch and zipper where excess zipper and fabric material fold outward forming a bulge, resembling a mountain, or even a boner; though both males and females are often victims of jessica's mountain. Jessica's mountain can usually be seen when one is sitting down.
austin d: dude josh, do you have a boner?
josh a: naw man thats just my jessicas mountain
by joshhhhhhh a June 19, 2008
 
2.
The part of your pants or shorts around the crotch and zipper where excess zipper and fabric material fold outward forming a bulge, resembling a mountain, or even a boner; though both males and females are often victims of jessica's mountain. Jessica's mountain can usually be seen when one is sitting down.
austin: dude do you have a boner?

josh: no man. that's just my jessica's mountain.
by jotagion June 14, 2008