Warrior mode: (adjective) when a man is working out, fighting, playing sports, etc, and his penis shrinks. This is a product of evolution because when men would fight in the beginning of time, there male genitalia would shrink so as to be a smaller target.
"Yo Garret, why is your penis so minuscule right now?" "Oh dude, I just got done with a jousting match and my body is still in warrior mode!"
by Burt Lancast March 19, 2016