Top Definition
A penis that is erected and Is Huge and is in comparison a t-rex compared to a raptor.
Dude Chris had such a t-rection last night at daniels house, i think hes gay!.
by Connor174 May 11, 2007
When your arms are resting in the raised position after doing arms at the gym. Making you walk around like a T-Rex.
Man, I've got a massive t-rection from doing arms at the gym today.
by Oxyjensen March 17, 2016
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