IPA: /ˈkɜːrbər/
KK: /ˈkɜr.bɚ/
A person who steals items through open windows using a hooked pole, or someone who restricts or controls something.
The curber was caught trying to steal a bag from the car through the open window.
Curber is formed from "curb" (from Old French *corbe*, meaning a bend or a curve) and "-er" (meaning a person who). A curber is a person who bends or restricts something, often used in the context of controlling or limiting behavior.
Think of someone who 'bends' or 'restricts' something — that's what a curber does.