slubba dub 

a tiny penis.

My ex gf said I had a slubba dub.

slubba dub by biscuito July 14, 2017

Subbadubbalab 

A double lab held with a substitute teacher.

Janie: Ugh, I have a double lab today.
George: Bummer. I had a subbadubbalab yesterday with Mr. T, and it was AWESOME!!
Janie: Mr. T is the best sub because he never makes you do anything.

Subbadubbalab by Georgette McGrath February 29, 2008