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1.
The sexual maneuver of a man cumming on only half the face of his sexual partner, then getting up and flexing every muscle in his torso and arms while yelling, "THIS IS SPARTAAAAA BITCH!!"

This term comes from the mask Gerard wears in his role in "Phantom of the Opera" (2004), and his famous body and line in the film "300" (2006).
"I had been working out all week, so I pulled The Gerard Butler on my girl last night".

"We just finished watching "300", so naturally, I did The Gerard Butler on her right after".
by ImNotThisGross August 08, 2010