simple past tense and past participle of nip at

(Ireland, UK, idiomatic, informal) Nude.

plural of NIP

To bite or pinch with small actions. / (of poor weather) To be cold; to be bitingly cold. / (idiomatic) To sip a drink (usually alcoholic) in small amounts.

To remove a bud [from a plant] to prevent flower and fruit from forming. / (idiomatic) To stop something at an early stage.

Minor cosmetic surgery that tightens loose skin.

With the advantage changing hands, or shifting back and forth among the available alternatives.

(idiomatic) So evenly matched that the advantage shifts from one to the other, and the outcome is uncertain.

plural of nip-out

(mining) The situation where the roof and thill approach each other, diminishing the usual thickness of the coal seam or extinguishing it completely.