Drain the main vein

Slang for "Urinate"

"The Main vein" being the penis of course.

"I gotta drain the main vein something fierce"

by Doc Evil July 24, 2003

drain my main vein

to piss (=

i'll be right back guys i gott go drain my main vein

by dongsaucer (= October 30, 2008

To drain the main vein

Expression: for guys to take a piss.

I need to drain the main vein...like right now. Is there an industrial area where I can do it on the street?

by Sexydimma July 26, 2025