Top Definition
When the crotch of a male's trousers or shorts has an sudden and unexpected rupture, causing "junk fall" in the wind.
This can include tightness of trousers, or looseness of shorts.
"Man, that guy the other night had such tight pants,that when he bent down to tie his lace he had junk explosion"
作者 evilmanny 2010年4月13日

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