As a Noun: 1. When you exercise, ENDORPHINS are produced by the pituitary gland in the brain. Endorphins can make you feel happy and well. Note: 1. There appears to be no commonly used Auslan sign for ENDORPHINS. If you know a sign for ENDORPHINS used by you or other Auslan users (deaf people or interpreters) please go to "missing sign feedback" and supply details. Thank you.