喷子

噴子
pēnzi
  1. sprayer; spraying apparatus
  2. (slang) firearm
  3. Internet troll; hater

CEDICT

slang

Entry Composition

1 喷 pēn
  1. to spout; to spurt; to spray; to puff
  2. (slang) to criticize scathingly (esp. online)
2 子 zi noun suffix, as in 椅子 yǐzi "chair"