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.
The objectification of the female reproductive system after a long and vigorous amount of time fornicating, where the large amount of air that passes between the so-called "Slip-and-Slide," and exits into the atmosphere; usually followed by an akward silence between the two parties.
A sexual move where a female blows into a male's asshole like a tuba. If done properly, the male's penis will blow up like a balloon. The male proceeds to "boom" her.
A Tuba Player is the most important person in a marching band, they provide the loud and deep tones that an audience loves to hear, and tubas are a great visual representing power like that of of the Player themselves