Originated in 4chan's /a/ board. A poster was describing his feelings towards the Fate/Stay Night character Archer, and mistyped "gay" as "gar".
"You are gar for badasses, but gay for traps."
2. At term used for ordering a PBR at the bar.
3. An abbreviation for "Beer Garden" when intoxicated.
2. Hey barkeep, get me an icy-cold delicious Gar!
3. I'll meet you in the beer gar in ten minutes for a smoke.