April 19 is when you send a friend, partner or someone you trust a picture of you flexing ur muscles.
*sends a picture of big booty flex*

wow! Happy national flex your muscles day! Here is one too ;)
by Nukemaster69 April 19, 2022
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Muscle lock

When you lock yo muscles hitting that shit
I blew aarons moms back out so hard using muscle lock
by Dprived November 12, 2023
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Smooth muscle

One of the three types of muscle. Widespread throughout the body, responsible for movement in the digestive, urinary and reproductive systems.
Person 1: *gets an erection*
Person 2: "Wow, your smooth muscles are really working there huh?"
by craigellachie March 02, 2022
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Doctor Muscles

It’s meaning incomes from the observation that male doctors often have muscles in the arms slightly above what the average or underweight person would have.
“I’m hoping to gain some doctor muscles at home before going to a gym.”
by SuddenlyCmour March 26, 2023
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Knuckles Muscles

A flex, usually in the form of an emoji, used to indicate a post of strength or celebrate the dunking upon of an irritant or adversary.
I added a knuckles muscles to Shan's post when he shutdown Sam's dumb idea.
by dux4life May 12, 2022
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mac the muscle man

A dickhead, who doesn’t give his beautiful, fantastic and just great girlfriend flowers and doesn’t come to london every time she asks, he’s rude and sends memes to other girls but he’s kinda cute and got a shlonggggg
mac the muscle man’s gf is mad at him 24/7
by jaicarrrrr November 23, 2021
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