Definition of "Litter" :

noun: material used to provide a bed for animals

noun: conveyance consisting of a chair or bed carried on two poles by bearers

noun: the offspring at one birth of a multiparous mammal

noun: rubbish carelessly dropped or left about (especially in public places)

verb: give birth to a litter of animals

verb: make a place messy by strewing garbage around

verb: strew

"Cigar butts littered the ground."