(informal, derogatory) The Sonny Bono Copyright Term Extension Act.

(Ireland, humorous) Of tea: made very strong.

(rare) Macrotarsomys bastardi, a species of rodent in the family Nesomyidae, found only in Madagascar.

A small mouse lemur (Microcebus berthae)

A species of mouse-eared bat, Myotis myotis, native to Europe.

Notomys mordax, an extinct murid known from a single skull found at Darling Downs, Queensland, Australia.

(rhetorical question, informal, sarcastic) Used as a response to statements starting with "we," usually indicating the speaker does not want to be involved in the interlocutor's statements.

Reithrodontomys bakeri, a species of Mexican harvest mouse.

A cat that catches mice, kept specifically for the purpose. [from 15th c.] / (chiefly Scotland, US) A moustache.

A hole through which a mouse enters a room. / Any small hole or opening. / (oil industry, drilling) The storage area on a drilling rig where the next joint of drilling pipe is held until needed.