Top definition
Laying flat on your back, on some type of hard floor (such a a bathroom floor)with your legs straight up in the air, while you masturbate and spunk into your mouth. Usually the tounge is hanging out the entire time. Also known as "shooting a 3 pointer"
Yea, that kid on the basketball team was worshiped, until they found out he loved to "mouthjack"
by Leslie Bopp August 04, 2006
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2
to jack off a dick with your mouth

a.k.a.: blow job
Hey girl can you mouth jack me?
by Tnay A. December 29, 2010
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