What is Christmas Crackers?
1.
The testicles (from rhyming slang, Christmas crackers = knackers).
Kevin was very excited: Britney had just asked him to show her his Christmas crackers. Two minutes, and a slap round the face later, he was so disappointed when he realised the pop-babe had no knowledge of British rhyming slang!
Contributor's footnote: A merry Christmas to one and all.