2) what you call a friend (affectionately) or non friend (who doesnt know what it means) when they do something a Fat kid would do (eg: scarf down food, fail to get up stairs, breathe super hard after running a short distance, etc)
Friend 1: He told me I was ugly!!
Friend 2: Ha! are you kidding?! he's a total FK
Ex 2 : (Said to your friend while she scarfs down her burger)
Friend: haha FK moment