bouncer

noun12

1. •
   A person or thing that bounces something, such as a ball.
2. •
   A member of security personnel employed by bars, nightclubs, etc. to decide who can enter, maintain order, and deal with patrons who cause trouble.

   • At 199 centimetres and a hundred kilos going up, he was scary big and he found work as a bouncer and enforcer[.] — 2010
3. •
   A short-pitched ball that bounces up towards, or above the height of the batsman’s head.

   • ‘You try to hit the bouncer that you should duck under. Your bat misses it completely. The ball strikes your temple, whack!’ — 1998
4. •
   A kind of seat mounted in a framework in which a baby can bounce up and down.

   • He shook his head and took up the child—Dilly kicked out her feet in tiny electric jolts to the full stretch of the Babygro.[…]He put the child in the bouncer again. — 2019
5. •
   A bouncy castle.
6. •
   (Internet) An account or server (as with IRC and FTP) that invisibly redirects requests to another, used for anonymity or vanity.
7. •
   Something big; a good stout example of the kind.

   • The stone must be a bouncer. — 1842
8. •
   (old-fashioned) One who bounces; a large, heavy person who makes much noise in moving.
9. •
   (slang, no longer used) A boaster; a bully.
10. •
    (slang, no longer used) A bold lie.

    • "… when he wants to accomplish his purpose, he does not hesitate to invent—I am not quite sure of the word, but I think it is “bouncers.” — 1877
11. •
    (slang, no longer used) A liar.
12. •
    (slang, no longer used) Short for shop-bouncer