Someone that stands behind another person and tries to give them instructions about how to squeeze a whitehead on their face.
I became very irritated when my mother stood behind me in front of the bathroom mirror as I was squeezing a pimple on my face. She kept telling me how to do it even after I told her to stop. I said, “Stop being a back seat pimple popper!”.
A Back Seat Manager is a toxic employee who does not have any authority and continually over inserts themselves on every process and decision that impact everyone else except themselves.
The inability to decide which seat to take due to the quantity of friends both "kickin' in the front seat" and "sittin' in the back seat." Characterized by indecision and anxiety as the individual has "gotta make their mind up."
A largely ignored condition until early 2011, the "front-seat back-seat dilemma" was widely publicized upon the advent of Rebecca Black's viral single "Friday."
Friend 1 (From the front seat): "Why won't Tim get in the car? I have a dermatologist appointment in 5 minutes!"
Friend 2 (From the back seat): "Dude, give him a break. He's suffering a front-seat back-seat dilemma. Everyone's been there once."