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1.
Slapping or smacking a girl's crotch with your boner and then proceeding to not sleep with her.
"That slutty girl thought she was going to get it good, but he ended up giving her the Gentleman's Knock."

or

"He was too much of a gentleman to get in there, so he just knocked."
by Amynonomous March 31, 2014

Words related to The Gentleman's Knock

boner gentleman knocking sex move slapping vagina