A person who's opinions and verbal expressions aren't of any interest to most people. It refers to a penis (cock) inserted into a mouth (gob) therefore "fuck what they say".
SORRY SLUTS!!▦ ▯▯▯▯ COCKTOBER▯▯IS OVERSORRY SLUTS!!▦ ▯▯▯▯ COCKTOBER▯▯IS OVERSORRY SLUTS!!▦ ▯▯▯▯ COCKTOBER▯▯IS OVERSORRY SLUTS!!▦ ▯▯▯▯ COCKTOBER▯▯IS OVER
this was a term used to announce to a group of people that an event, that occurs within the month of October, has ending. a great uprising will follow suit