biorhythm 

That word in Seungcheol's rap that Carats don't understand.

When I see you, I feel good. You are my biorhythm

biorhythm by svtwooji December 23, 2016

biorhythmic orientation 

Pual's lame ass excuse for using big words on mammalology exams when he hasn't eaten for two minutes

Paul's biorhthmic orientation was off today due to a lack of chips

biorhythmic orientation by Rick James May 7, 2004