Definitions by observer12345

fent flop 

A state of somnolence with intermittent jerking and flopping movements in the acute stages of a fentanyl injection, originally coined in the "Gem City" among recurrent fentanyl users.

My brother gets high all the time, when he does he does the "fent flop" until he comes down.

fent flop by observer12345 February 7, 2022