Etymology

sissy

S1I1S1S1Y4

Today it means: An effeminate boy or man. Full definition →

French pipi
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sissy · noun, adjective1

From sis (“clipping of sister”) + -y.

sissy · noun, verb2

  1. French · derived frompipi“urine”
  2. English todaysissy

Likely onomatopoetic, perhaps related to French pipi (“urine”). Compare piss; wee-wee.

sissy · verb3

Clipping of sissygasm.

Etymology from Wiktionary, CC BY-SA 4.0.