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1.
To collapse in on ones self, to explode inwards. Also, to fail miserably at something.
Shit, i fucking imploded on that math test.
by Burt Reynolds February 26, 2003
 
2.
To try not to laugh because your boss is there while you are receiving hilarious IMs
Dan totally IMploded when Katy recounted her weekend over IChat. His boss asked what the hell was wrong with him.
by allatymhaha April 13, 2009
 
3.
The exact opposite of explode
Not only did she suck the skin off my dick, but, she made my balls implode. I think even my ass caved in.
by SONIC March 14, 2004