noun Animal Behavior.
a behavioral response of many male mammals, especially deer, antelope, and other artiodactyls, consisting of lip curling and head raising after sniffing a female's urine.
Origin of flehmen
< German Flehmen, noun use of infinitive: (of a domestic ungulate) to curl the lip; compare dial. (Upper Saxony) flemmen to look spiteful; further relations unclear
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019