Muscle sperm

Involuntary contractions of a muscle, typically harmless and temporary, but can be painful.

"Ow my muscle! What is this?" "Muscle sperm lolololol"

by Maximum Hamilton June 21, 2023

muscle mass

Mike n Chris

Trentwins are the definition of muscle mass

by Lgdabuser June 22, 2023

Italian muscle

When speaking of one's Italian muscle, one often refers to the male genitalia also referred to as 'phallus'. Due to the Italian culture often being associated with romance and affection, and the penis being a prominent muscle, one's "Italian muscle" is a reference to one's penis.

"He really knows how to flex his Italian muscle"
"I could use some Italian muscle on Friday night"

by Michelangelo November 29, 2021

pimp muscle

a pimps penis,cock,or tallywacker

the pimps pimp muscle was stiff with excitement

by Tyler Barron January 27, 2005

jo muscle

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 January 20, 2009

Facebook Muscles

(n) When someone says stuff on their wall, others wall, and or private message that they would never say in person.
(v) The act of messaging or posting on a wall, that would never be said in person.

(adj) ex: The guy hit on a girl by posting how hot she is on her photo in facebook, but when they got together he coward away. "Man that guy has facebook muscles".

by usmcvince January 18, 2012

Masturbation Muscle

When a male has fapped so much, that one arm is bigger than the other one.

Guy 1 "Dude how did Daniel get so buff?"

Guy 2 "Look at his arm."

Guy 2 "It's because he tones his Masturbation Muscle."

Daniel "No! I just workout."

by Lifewithaknife November 1, 2011