Top definition
The guy who laughs three seconds after everyone else.

It means someone who's IQ is a touch on the low side
The stand up comic was awesome, but there was a really annoying three seconder in the row behind us.

Dave is a bit of a three seconder sometimes.
by George McBob May 18, 2009
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2
A sexual partner who is so erotically stimulating it is impossible for anyone to last more than 3 seconds without reaching orgasm
Yeah Dude, I'll be back soon, Veronica is totally a three seconder
by River King August 11, 2016
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