Best definition
To cry and masturbate at the same time; to lament while “beating it”.

“I heard after Carla turned him down, he just hid in her room and WAAHsturbated. She had to call the cops!”
WAAHsturbate: define #2
Using one’s tears as a lubrication for masturbation.
After my cat died, I started to waahsturbate on all of the walls