present participle of let sleeping dogs lie

A rhetorical question, used to tell someone that they should feel guilty about something.

Said of something that can be done very easily.

(humorous) A supposed motto describing the dynamics of incest.

(colloquial, rhetorical question) Synonym of is the Pope Catholic

A group of people (sleepers) who inconspicuously remain dormant in a community until activated, by a prearranged signal, to perform acts of espionage, sabotage, and/or terrorism.

Someone who sleeps. / That which lies dormant, as a law. / A spy, saboteur, or terrorist who lives unobtrusively in a community until activated by a prearranged signal; may be part of a sleeper cell.

(rare) To mark a calf by cutting its ear.

(rail transport, Britain) A railroad tie. / (carpentry) A structural beam in a floor running perpendicular to both the joists beneath and floorboards above.

(archaic) Third-person singular simple present indicative form of sleep