The space between a bump in the shirt and an erection.
Did you see that guys mushroom gorge posted all over Instagram?
n. The space between the lump in a shirt or pant leg and an erect penis, but only when the man \ with an erect penis is wearing shorts or pants, so his erection looks like a hill.
v. The act of causing a mushroom gorge to happen
n. I got extremely confused when I saw his mushroom gorge.
v. I could tell that he was mushroom gorging on purpose.