Adjective: rancid ran-sid
- (used of decomposing oils or fats) having a rank smell or taste usually due to a chemical change or decomposition
"rancid butter"; "rancid bacon"
- Smelling of fermentation or staleness
"The rancid butter made her wrinkle her nose";
- sour
See also: ill-smelling, malodorous, malodourous [Brit, Cdn, non-standard], minging [Brit, informal], niffy [Brit, informal], pongy [Brit, informal], stale, stinky [informal], unpleasant-smelling, whiffy [Brit, informal]
Encyclopedia: Rancid