The "Just One Pump" Frappuccino is the favourite drink of skinny bitches, along with the Vodka Diet Coke.

This is an option you can ask for when ordering your Frappuccino at Starbucks.

It refers to barristas pumping less sugar syrup into your drink to have less calories.
Barristas usually put 2 or 3 pumps in the cup, skinny bitches want only 1.

A person with an outwardly dominant, masculine, or aggressive personality, but who also enthusiastically takes on the submissive or "bottom" role in the bedroom.