It’s "pèpè". They also call them "kenedi" or "rad kenedi"
They are more specifically barely used or second hand clothing (usually from the US) sold in the Haitian flea markets.
We may say “rad drive” (rad dreevay) – when talking about used clothing we wear at home, clothes not used for outings. We also say “Rad ize” (“Rad dezyèm men”) – used clothing
Rad sòti – clothes used for outings, good clothes
Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words