Stinger

n. organ or part that stings; something that is emotionally hurtful; painful blow

A stinger (or more correctly, sting) is a common term for a sharp organ or body part found in various animals and plants that usually delivers some kind of venom (usually piercing the skin of another animal) or an electric shock. A poisonous sting differs from other piercing organs in that it pierces by its own action, as opposed to teeth, which pierce by the force of jaws, or thorns, which pierce by the action of the victim.
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Noun
1. a portable low altitude surface-to-air missile system using infrared guidance and an impact fuse; fired from the shoulder
(hypernym) surface-to-air missile, SAM

Noun
1. a cocktail made of made of creme de menthe and brandy
(hypernym) cocktail
(substance-meronym) brandy
2. a remark capable of wounding mentally; "the unkindest cut of all"
(synonym) cut
(hypernym) abuse, insult, revilement, contumely, vilification
(derivation) sting
3. a sharp organ of offense or defense (as of a wasp or stingray or scorpion) often connected with a poison gland
(hypernym) organ
(hyponym) aculeus
(derivation) bite, sting, burn
4. a sharp stinging blow
(hypernym) blow
(derivation) bite, sting, burn

(n.)
One who, or that which, stings.
  

     resting