Snapper

noun

1. One who, or that which, snaps.

   "a snapper-up of bargains"

2. Any of approximately 100 different species of fish.
3. A (human) baby.
4. The player who snaps the ball to start the play.
5. Small, paper-wrapped item containing a minute quantity of explosive composition coated on small bits of sand, which explodes noisily when thrown onto a hard surface.