nob stands for nut on back originating from carter and max .Max nobbed all over carter s back, meaning he whipped out his johnson started gooning to addison rae and instabusted all on him for funsies.
guy1: hey man just bought myself a new nob woggle it looks so cool
guy2: *silence*
guy1: do you want to have a look?
guy2: its cool man, ill just take your word for it