turtleneck

Related to turtleneck: Turtleneck sweater

turtleneck

slang The foreskin of the penis. An allusion to a type of sweater with a high, tubular, close-fitting collar. At first I assumed we'd get our son circumcised, but the doctors said there was no reason to get rid of his little turtleneck.
Farlex Dictionary of Idioms.

turtle-neck

n. the penile foreskin. (A play on the type of collar.) He’s talking to the doctor about getting rid of his little turtle-neck.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • turtle-neck
  • end game
  • a mess of pottage
  • smeg
  • a security blanket
  • game is not worth the candle, the
  • strike out at (something or some place)
  • hit (something) out of the (ball)park
  • Marie Celeste
  • end run