unidolphin 

dolphin with unicorn horn. 100% NOT NARWHALS

hey did you hear about that unicorn fish?
Narwhals? naw man. unidolphins.

unidolphin by dolphin_mother January 21, 2017

undorphins 

A negative feeling after a major workout, whether it is being tired, exhausted, depressed, etc. The opposite of endorphins.

After going for a run, I felt exhausted with pain coursing through my body, followed by feeling tired. Why did I have so many undorphins?

undorphins by JoltIR0N April 9, 2019