What is the meaning of the word "goop"?

Definitions:

  1. any thick, viscous matter copy to clipboard noun
    • I got some kind of goop on my pants. copy to clipboard
  2. street names for gamma hydroxybutyrate copy to clipboard noun
    • Gamma hydroxybutyrate, commonly referred to as GHB, is known as goop in some circles. copy to clipboard

Synonyms: