[ofteng-] a person who maliciously spoils the fun of others
Origin of Grinchafter the title character of a children's book, How the Grinch Stole Christmas! (1957), by Dr. Seuss
A mean-spirited, spiteful person.
Origin of GrinchAfter the Grinch title character of the children's book How the Grinch Stole Christmas (1957) by Dr. Seuss (Theodor Seuss Geisel)