flehmen means flaring of the lip in mammals, associated with intensive smelling; flehming. Lexicurio rates it Sui generis — a strength score of 87 out of 100.
noun
- Flaring of the lip in mammals, associated with intensive smelling; flehming.“During the preliminary phase of courtship between captive animals, Matthew Gaughwin observed flehmen on a number of occasions when the male sniffed intensely at areas of ground where the female had previously urinated and once when the male had sniffed the female's cloacal region.”