Definitions by Gloss man

Monster's Ink 

The act of masterbating in the middle of the night whilst your partner is sleeping. Then on the brink of ejactulation, you let out a horrify shriek while unloading on the their face.

"Dude, last night I totally pulled a monster's ink on my chick! She woke up screaming!"

Monster's Ink by Gloss man March 18, 2014