Lizard Brain

Lizard Brain is a term used to describe when a person (typically a man) loses all ability to think straight, due to being horny. When a man has lizard brain, he is thinking with his penis not his brain.

Lizard brain from the male point of view:
Her: “Oh my gosh, stop grabbing my ass! I am trying to get stuff done.”
Him: “ I can’t help it! You’re too sexy… my lizard brain took over.”

Lizard brain from the female point of view:
Her: “I’m telling you girl, he has a lizard brain! He can’t even have a conversation with me without getting distracted by my cleavage.”