Scott Differ

A Scott Differ is Glasgow slang for an ass sniffer. Usually refers to those who find ass jokes funny and consistently threaten to "eat your ass.". This may be derived from the insecurities Scott Differs feel about his/herself, as they haver no power or authority in everyday life, they profusely strive to find any sense of dominance.

Person 1: Come here boy, lemme suck your booty hole!
Peron 2: Ew, you're quite a Scott Differ