A very big low brass instrument that is fucked by guys with GIANT dicks; also a instrument that a fat guy named Robbie rules.
by Holden Smith December 2, 2006
a type of urinal, the kind you might find in most male bathrooms. a tuba is the kind of urinal that is lower to the ground for midgets, and an inconveniance for tall people. it usually has the most bacteria on it, so cotton swabs can be used to test for this. occasionally mistaken for a musical instrument.
Abigail: Emily, we just tested the tuba for bacteria and man is there a lot!
Emily: What, you mean like a urinal?
Abigail: Yeah!
The tall man was at a disadvantage using the tuba urinal.
by Beka Lioki December 15, 2007
"The last time I ate that much chili, I was doing tuba solos all night. My wife had to go sleep on the couch."
by Crossfire905 December 25, 2012
The cacophony of sound made by multiple noisy farts and/or bowel movements coming from multiple stalls in the mens bathroom.
I couldn't take a crap today at work; there was only one stall available in the mens bathroom and I didn't want to join the tuba circus.
by C. Elliot Lee September 20, 2013
The expelling of gas resulting in a low tone like that made by a tuba. Akin to a bugle fart but a much lower tone is produced when really pushing hard in order to hammer that sucker out.
by thejimparker November 28, 2016
by D-McNasty December 30, 2011