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
"Cigar butts littered the ground."