What is Zavalis?
A feeling of light-headedness achieved post ejaculation. Being caused by a sudden rush of blood from the head, often leading to after-nut headaches. Believed to be an STD.
I was jacking off in the shower and right after I busted my load I got dizzy and hit my head on the wall. Afterwards there was a raging headache. I must have a bad case of Zavalis.