Boo dub - when a bartender totally messes up your drink order.
George - "hi mate, yaright? Can i get one of them brew dogs please?"
Bartender - "boo dub?"
"Ahhh luke, that guy totally boo dubbed my order man, ffs son. Should i go back and shovel fuck his head?"
"Naaah mate just leave it, i know where he lives anyway, we'll fucking egg his house later"