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The act of clinging to a female all night to prevent and other males from attempting contact
Oi thom, let that girl breathe dude! You've been man marking her all night
by thejanitor7 November 24, 2014
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When a man viciously doesn't let his girlfriend out of his sight, for fear of rival men stealing her away.
Is Dave coming out tonight?

No, he's at Kelly's worksite, man marking her like a pro.
by Daniel.Crag August 01, 2014
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