A person that primarily works their upper body in the weight room, typically their arms. They have usually large arms, abs, and sometimes a larger chest, while lacking legs and other muscles that are challenging to hit. Often wear sweat pants to the weight room to hide their small legs.
Look at that Billy Bicep over there doing curls.

The situation is a Billy Bicep.

That Billy Bicep over there has some serious chicken legs.
by Billy Bicep June 4, 2010
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A condition where the biceps of a person are malformed to resemble baseballs, caused by improper exercising techniques. Usually this happens when a person half-extends their arm when exercising over a period of time. For example, on a chin-up bar, the person never lowers their body below the half-way point (the farthest they extend makes their arms look "L" shaped). Once acquired, this condition is very difficult to correct. Not only does it limit the person's lifting potential, it looks unattractive to most people.
Hey check out that meat head over there, his baseball biceps look ugly as hell.

I'd better be careful of my lifting technique or I might be stricken with the infamous baseball biceps.

God damnit, I have baseball biceps. Welp, time for amputation.
by Brian Metcalfe May 27, 2006
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When an individual's back hurts but says it's his or her bicep that has torn
Johann: My back hurts
Zaid: What happened
Johann: I tore my bicep so my back hurts
Zaid: Doing what?
Johann: I was gardening while having the big gay sex with your mom
Zaid: Makes sense
Johann: When an individual's back hurts but says it's his or her bicep that has torn
Zaid: Ahhhhh ur bicep tear makes sense now
by Cakeeater123 February 20, 2018
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pronoun- antecedent is always "biceps"
Expression used for the sake of being used; has lost most of original meaning
Origin- Speculated to have been coined by Theodore Roosevelt, as he was known to have an extremely well developed upper body.
"Knock Knock"
"Who's there?"
"Probably my biceps"
*swooning and possible copulation ensues*
by Jessetotallydidnotmakethis February 8, 2013
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The threshold of upper-body muscularity of a female that determines her eligibility for procreative, romantic and other amorous activities.
"Dude I think that girl from the rock gym is hot. I think I'm going to bring her home tonight."

"Seriously man? She's way past the bangable bicep line for me."
by finest-one April 6, 2012
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The biceps of a truck stop hooker. The constant pulling motion gives the arms a signature look.
by Irishbackrub January 18, 2017
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