pricker

Short definition from Wiktionary

Noun

1. 1
   One who pricks.
2. 2
   A tool for pricking.
3. 3
   A prickle or thorn.
4. 4
   Any of several American prickly woody vines of the genus Smilax; greenbrier.
5. 5
   One who spurs forward; a light-horseman.
6. 6
   A priming wire; a priming needle, used in blasting and gunnery.
7. 7
   A small marlinespike used in sailmaking.