Although it was originally a typo of 'gay', it has been eventually used to describe existences that have transcended both time and space to a god-like status.
A: "Yesterday I thought it was a good idea to watch hentai in the public"
B: "Wait you don't usually watch hentai outdoors?"
A: "now that's gat"
B: "Wait you don't usually watch hentai outdoors?"
A: "now that's gat"
by Pransneak June 4, 2020
Get the gatmug. 
Gat, a word used when trying to call someone gay on modrated chat or just misspelling the word gay the real meaning of this word is a overly homosexual gamer
by Not Andreeeeee April 2, 2018
Get the Gatmug. by Ramenoodleranger October 7, 2020
Get the GATmug. by Love your dad January 11, 2020
Get the Gatmug. by Oct4ne February 19, 2022
Get the Gatmug. 