Retarded T-rex 

A T-rex whose intelligence is far below that of a normal T-rex. They are known for random flailings as a means of attack, but should be considered harmless, for they will more than like trip in their attack run.

Jesse Slade

Retarded T-rex by Dexter February 18, 2004

Retarded Tyrannosaurus Rex

When a man, laying flat on his back, is having sex with a women who is sitting on top and facing forward. Right at the very moment when the man is about/during to cum, the woman surprises the man with a full force punch to the solar plexus, aka the middle of the chest. This with cause the mans face to contort and his arms to pull into his chest; like a retarded T-Rex.

It was Stacie man, she pulled a Retarded Tyrannosaurus Rex on me last night and I haven't been able to breath right since.

Retarded Tyrannosaurus Rex by Genis9000 March 12, 2011