turtleneck

noun

1. (Canada, US)A high, close-fitting collar, turned back on itself and covering all or most of the neck, on a sweater or similar garment.
2. (Canada, US, abbreviation, alt-of, ellipsis)Ellipsis of turtleneck sweater.

   “I've got billions and billions of rhymes to flex / 'Cause I've got more rhymes than Carl Sagan's got turtlenecks”

   “Still, Jobs became friends with fashion designer Issey Miyake, who had designed some Sony uniforms, and asked him to make some black turtlenecks that he liked.”

3. (slang)A foreskin.