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To literally mean to Fuck or be a fucker.

Usually applied when someone is being a fucker, fucking, or just the plain fuck.

It can be used as a verb, describing the action.

"Hey yo man, don't be such a maple-leafer!''

"Imma maple-leaf that bitch, cuz she stole may cookies."

Man 1 - "What is Mark doing?"

Man 2 - "Oh nothing. Just maple-leafing that hot chick from the bar!"

Man 1 - "Nice!"
by Feng Ye May 01, 2010
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