To drink or eat something liquid or semi-liquid noisily, making a sucking sound.
Likely from Middle Dutch 'slurpen' or Low German 'slurp,' an onomatopoeia imitating the sound itself. Became standard English by the 17th century.
Slurping is considered rude in English culture but polite in Japanese culture when eating noodles—it's one of the clearest examples of how the same sound carries completely opposite social meanings depending on culture.
Complete word intelligence in one call. Free tier — 50 lookups/day.