suspender

noun3

1. •
   (US) An item of apparel consisting of a strap worn over the shoulder and used to hold up trousers.
2. •
   (UK) An item of apparel used to hold up a sock or (now especially) a stocking, such as a garter, or each of the fastening-straps attached to a corset or suspender belt.
3. •
   Something or someone who suspends.