Sponge Bob Pajama Pants

sponge bob
SpongeBob SquarePants (often referred to simply as SpongeBob) is an American animated television series, created by marine biologist and animator Stephen Hillenburg.

pajama
(usually plural) loose-fitting nightclothes worn for sleeping or lounging; have a jacket top and trousers
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.
a pair of loose trousers tied by a drawstring around the waist; worn by men and women in some Asian countries

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