Grinch
Concise Oxford English Dictionary © 2008 Oxford University Press:
Grinch /grɪntʃ/
▶noun N. Amer. informal a spoilsport or killjoy.
– origin 1970s: a character in the children's story How the Grinch Stole Christmas by Dr Seuss.
'Grinch' also found in these Oxford entries:

