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1.
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

Words related to mouthjack

air bathroom floor jack legs mouth mouth-jack
 
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