sud

noun1

1. •
   (informal) A bubble of lather or foam (the singular of suds).

   • There is a beer sud parked on her upper lip. — 2018

noun3

1. •
   Acronym of substance use disorder.
2. •
   Acronym of subjective unit of disturbance.
3. •
   Acronym of sudden unexplained death.

noun1

1. •
   A department in Haiti.