“What do you call a mustache soaked in urine?”/“A pistachio.”

Entry in progress—B.P.
 
“What do you call a mad nut?”/“A pistachio” is another pistachio riddle.
 
 
Wikipedia: Pistachio
The pistachio (/pɪˈstɑːʃiˌoʊ, -ˈstæ-/, Pistacia vera), a member of the cashew family, is a small tree originating from Central Asia and the Middle East. The tree produces seeds that are widely consumed as food.
       
Twitter
Steve Tricker‏
@Bluesoup_Steve
What do you call a drunk man with a moustache eating nuts? Pistachio. Boom boom. #bluesoupcomms
8:17 AM - 14 Sep 2011
 
Twitter
Tania Mancilla‏
@Oscarbaby001
What do you call a pistachio with a mustache? #amustachio
6:59 PM - 10 Jun 2012
   
Twitter
Abigail Roberts‏
@AbiKRoberts
What do you call a nut with a moustache?
A Pistachio
4:32 PM - 27 May 2013
 
Twitter
Mark DeMille‏
@marboose
What do you call a smelly mustache? PISTACHIO
5:25 AM - 11 Jun 2013
 
Reddit—Jokes
What do you call a mustache soaked in urine?
submitted November 25, 2017 by Oktayey
A pistachio.