Meaning

• One who, or that which, bends.

• A device to aid bending of pipes to a specific angle.

• A bout of heavy drinking.

  "He's been out on a bender with his mates."

• A homosexual man.

• A simple shelter, made using flexible branches or withies

• A suspended sentence.

• A sixpence.

• A spree, a frolic.

• Something exceptional.

Meaning

• (British slang) Used to express disbelief or doubt at what one has just heard.

• (British slang) Used to indicate that the previous phrase was meant sarcastically or ironically.

  "O yes, I'll do it — bender!"