Tubist

A tubist is the fierce ass tuba players who are genuinely the greatest people in the band, preferably the marching band

“Oh look at that fierce ass tubist guuuurl she MUST be the coolest person ever

Bitchini Bottom

When someone asks where your going but you don’t like them

Or when you want to give someone a nick name.

“Where are you going that you can’t come to my party”

“Bitchini bottom beach”

Or

“Heeeey bitchini bottom”