(UK politics, informal) A surprising resurgence of popularity on the part of Boris Johnson.

(oil industry) Revenues received from the sale of oil or gas on spot market minus the costs of extraction, processing and transportation.

(zoology) A behavior in which an animal curls back its upper lip exposing its front teeth, inhales with the nostrils usually closed, and then often holds this position for several seconds.

(anatomy) Of, pertaining to, or connecting the frontal lobes and the cerebellum