1. Any thick, viscous matter
   "The mechanic's hands were covered in engine goop";
   - sludge, slime, goo [informal], gook [informal], guck [N. Amer, informal], gunk [informal], muck, ooze, gloop [Brit, Cdn, informal]
    
2. [N. Amer, slang] Street name for gamma hydroxybutyrate
   "The police warned about the dangers of goop";
   - soap [slang], scoop [slang], max [slang], liquid ecstasy [slang], Georgia home boy [slang], easy lay [slang], thick [slang], gloop [Brit, Cdn, slang]
    
3. A semiliquid substance, often sticky or sloppy
   "The mechanic wiped the goop off his hands after fixing the engine";
   - gloop [Brit, Cdn, informal]

Derived forms: goops

Type of: gamma hydroxybutyrate, GHB, matter

Encyclopedia: Goop