2 definitions by mrs. phelps<3

Top Definition
the jack-off muscle
put your dominant arm out in front of you.
put your hand in a fist.
then move your wrist up and down.
you will see the muscle in your arm go up and down.
girls already have it but boys can develop a bigger jo muscle.
by mrs. phelps<3 October 08, 2008
Michael Phelps's wife.
irmina is mrs. phelps
by mrs. phelps<3 October 08, 2008

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