A Raging Starbucks Cunt is a raging cunt who LIVES at starbucks and typically order's some long named drink and takes pictures of it for instagram.
an example of the drinks there order -> "double chocolate twisty nips gang bang extra S A U C E shit in my grandad's hole latte" An example of "A raging Starbucks Cunt" is the following
charlie: Hey look she's A Raging Starbucks Cunt taking a picture of her drink.
eric: Yeah she's 100% taking that for instagram.
some smart ass: not all ugly thots that take pictures of there double chocolate twisty nips gang bang extra S A U C E shit in my grand dads hole latte's are doing it for instagram.
charlie and eric at the same time: Yes, all of them.
some smart ass: No!
charlie: betcha your life she's on instagram.
some smart ass: sure
Raging Starbucks Cunt: Yeah im on instagram. uwu rawr.
some smart ass: that bet was a joke right? r-r-right??!?!?!?
(gun shots and screams)