I just wanted to share my favorite USAF patch. The Wild Weasels were founded in 1965 during the Vietnam War. Their mission was to fly directly at enemy Surface-to-Air Missile (SAM) sites, get locked on by the SAM sites, and then launch a radiation seeking missile at the SAM site radars. The unofficial motto YGBSM is on their patch, and it stands for "You Gotta Be Shittin' Me." The F-16CJs currently still fly the Wild Weasel missions.
The unofficial motto of the Wild Weasel crews is YGBSM: "You Gotta Be Shittin' Me". This appears prominently on the logo patch of some squadrons. As the story goes, this was the response of Jack Donovan, a former B-52 EWO (Electronic Warfare Officer):
This was the natural response of an educated man, a veteran EWO on B-52s and the like, upon learning that he was to fly back seat to a self-absorbed fighter pilot while acting as flypaper for enemy SAMs
His exact words were: "You want me to fly in the back of a little tiny fighter aircraft with a crazy fighter pilot who thinks he's invincible, home in on a SAM site in North Vietnam, and shoot it before it shoots me, you gotta be shittin' me!"
https://en.wikipedia.org/wiki/Wild_Weasel