What is A Fat?
1.
An aussie term for an erection
I saw this chick , man i cracked a fat!
See
2.
a really fat joint, also called a fattie, that is packed with 1-1 and half grams of weed instead of just a half.
Ex. Yesterday I rolled a really good fat.
Dave: I smoked a fat yesterday. Man I was sooo blunted.
See