A function check is a military euphemism for male masturbation, as if to compare the penis to a weapon.
Private Duffy, perform a function check on that M4 rifle.
Yo man, I’m so horny I’m going to go perform a “function check”. If you know what I mean.
Yo man, I’m so horny I’m going to go perform a “function check”. If you know what I mean.
by Humpty1963 December 8, 2022