Weather-head 

Someone who’s mood changes constantly

Reegan is crying again? What a weather-head

Weather-head by Sir Julius September 4, 2020

weatherheaded 

Someone who, at school, volunteers to do an example on the board. Upon reaching the board, the student forgets how to solve the problem and freezes. In a confused and embarrased state, the student then makes his way back to his desk and is shamed by his fellow classmates.

Jon: "I'm done professor"
Professor: "then go ahead and do the sorting algorithm Jonathan"
*Jon draws a blank at the front of the class and returns to his desk shamefully*
Phil: "Weatherheaded!"

weatherheaded by pcaston2 December 7, 2005

Weatherhead 

Australian variation on a combination of the Dirty Sanchez and Rusty Trombone, performed on ones self.

I was really bored at work so I thought I'd give myself a weatherhead. It was great

Weatherhead by GreaseLightening July 8, 2010