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.
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
Kind of like beer muscles, where some billionaires think they can walk over the little guy/people that oppose some of their plans/agenda. Some billionaires get the idea in their head that they are the hand that feeds everybody.
The guy/girl used his/her billionaire muscles to threaten to move sports teams unless people were taxed to keep them where they were (kind of like hostages). It was one of the many things a billionaire could do that others couldn't, and he/she often took advantage of it to fuck with people that he/she thought were weaker. Elite billionaires don't have to give a fuck what the little people want, they know that democracy doesn't get anybody too far when they are the ones building everything.
by The Original Agahnim December 21, 2021
The supernatural ability that some women’s pussies have to grip a dick during a vigorous banging session. It will usually result in immediate jizzing for all but the most experienced men.
Pat: Was that broad you brought home last night worth another run?
Lee: She was like a unicorn using her magical superpowers of the 3rd muscle to grip my dick I lost it and filled her full.
Lee: She was like a unicorn using her magical superpowers of the 3rd muscle to grip my dick I lost it and filled her full.
by Bluto726 March 19, 2022
by IvorBiggunFan March 22, 2024
by KCMOMAN April 24, 2012
A popular trend starting in late 2021 to current of females posing in tights or yoga pants highlighting their buttocks, usually in a gym or other athletic environment.
by Hype_813 December 19, 2023