Grinch Pajama Pants

grinch
A person who is mean-spirited and unfriendly
How the Grinch Stole Christmas! is a children's story by Dr. Seuss written in rhymed verse with illustrations by the author. It was published as a book by Random House in 1957, and at approximately the same time in an issue of Redbook Magazine .
A grouch or killjoy; A person who aggressively sets out to ruin the Christmas holidays for others
The Grinch is a video game based on the film, Dr. Seuss' How the Grinch Stole Christmas. The game was released shortly after the film hit theaters.

pajama
a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries
Pajamas, also spelled pyjamas (see also spelling differences) can refer to several related types of clothing. The original paijama are loose, lightweight trousers fitted with drawstring waistbands and worn in South and West Asia by both sexes.
(usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers

pants
bloomers: underpants worn by women; "she was afraid that her bloomers might have been showing"
Trousers
(pant) breathe noisily, as when one is exhausted; "The runners reached the finish line, panting heavily"
(pant) the noise made by a short puff of steam (as from an engine)
Underpants
Rubbish; nonsense