It's what you say when something is overly disgusting.
Person1:I just saw some guy eat a rat off the street!!
Person2:ewwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww
by December 01, 2021
Get the ewwwwwwwwwwwwwwwwwwwwwwwwwwwwwwww mug.