Any of various insects of the order Hemiptera and in particular of the suborder Heteroptera, that are wingless or have two pairs of wings, and have mouthparts adapted for piercing and sucking.

An insecticide for killing household pests. / Insect repellent.

Alternative spelling of ladybug

The American cockroach (Periplaneta americana).

Blattella germanica; German cockroach. See cockroach

(Internet, marketing) A small, usually transparent image added by an advertiser to a webpage (to track its popularity) or email message (to track when it is read).

plural of Croton bug

plural of palmetto bug

plural of bug-bear

(idiomatic, informal, transitive, dismissal) Used to tell somebody to leave one alone.