wild hair 

Sudden decision that is not expected.

Grisham said the judge from N.Y. got a wild hair and set up his own outfit in Memphis
After our marriage, my wife got a wild hair and got involved with the Nudist Movement

wild hair by Samon August 15, 2006

Wild Hair 

A Boomer expression meaning random urge to do something immediately

"I don't know why Gretchen ate that whole bottle of Sriracha, must've been a wild hair,"
"Who is Gretchen grandpa? Also put your pants on!"

Wild Hair by Anotherdudeguy December 28, 2021

Wild hair up his ass 

An action of a sudden & unexpected nature. Something done by a person that is uncharacteristic for that person to do.

"Sam out of nowhere got a wild hair up his ass & moved to Dubai to study Scandinavian Moose!

Wild hair up his ass by tokabowla January 31, 2009

a wild hair up my butt 

A sarcastic way of saying/admitting that you made a mistake, or did something stupid/ irresponsible.

Homeowner: "I didn't ask for that! I'm not paying for it!"
Carpenter: "I'm sorry mam, i thought it would be a nice touch. Guess I had a wild hair up my butt on that!"

a wild hair up my butt by talk2me-JCH2 April 17, 2021

Wild hairy bob 

A wild hairy bob is a beast that no man can tame. He is a creature that is half man and half squatch.

Rumor has it that the Wild Hairy Bob was once caught and tied up naked inside a barn.

Wild Hairy Bob

Wild hairy bob by SquatchBeliever288 July 25, 2016

wildhairybeast

Stanley's fatass!!!

The wildhairybeast was playing hopscotch with the neighborhood children.

wildhairybeast by Shayna April 22, 2003