big mouthed

Based on the Netflix show 'Big Mouth' one of the characters masterbates whilst on a sleep over at his friend's house. To big mouth someone is to masterbate at at a sleep over when others sleep.

Finn: "I know you big mouthed me last night..."
Daniel:"Omg! I thought you were asleep I'm so sorry... I was just so horny."

big mouthed by ScruffyNuffy July 2, 2018

Bigmouthery 

The act or practice of being a bigmouth i.e. to wantonly offer one's opinion at will, whether well-reasoned or not.

"'My opinion is of such importance that it is incumbent upon me to have a blog page so that the less fortunate may bask in my totally uninformed thoughts. That's why it's called 'Bigmouthery'". - N Francis Doyle, Bigmouthery blog.

Bigmouthery by Space oreo July 28, 2009