It is a special kind of muscle obtained from coding for too long every day, over the years. It is a special symptom that only happens to programmers (general term, including but not limited to developers, software engineers, data scientist, data analyst, etc. in a word, anyone who codes for a living).
programmer finger muscle: Coding for 1 year, finally get the programmer finger muscle.
by Kibberjebber August 31, 2017
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another name for your obliques (and often occasionally your forearm muscles)
josh: Dude, Quinn, nice fishing muscles. Been hitting the gym?

Quinn: kinda...
by gotfan November 07, 2011
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The large, basically useless muscles of bodybuilders, Californians and Jersey Shore Characters.
Mike "The Situation" has a lot of flash muscle. Urijah Faber could beat him with one hand.
by deadheart January 14, 2011
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false bravado
When someone becomes "tough" and "combative" in an email, but never in person, or on the phone. A false show of digital power and might. A manifestation of their own sense of righteous indignation.
Email Muscles
Ninja 1 in an email format: "I asked you for that report last week you never responded, I'm losing confidence in you and your firm & will take my business else where."

Ninja 1 in a phone conversation: "Hey buddy, I know you have been busy, any chance of getting that report any time this week? No rush!"
by paranoidrain June 24, 2011
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As in "To Be Determined". The excess fat, chunkyness, fluffyness, or plumpness on a person's body. Typically located in the midsection area of the human body blocking the abs.
Matt: Dude, you really need to start exercising.
Ricky: Yeah, I guess it's time to start figuring out what I'm gonna do with all this TBD muscle.
by Breaston December 14, 2009
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