YGTBSM 

You've Got To Be Shitting Me

You've Got To Be Shitting Me!

YGTBSM by Tony Nguyen July 12, 2005

YGTBSM 

You got to be shitting me

his statements make you go "YGTBSM"!

YGTBSM by Heir Fubar January 6, 2017

YGBSM

Motto of the Wild Weasels - You Gotta Be Shittin Me
The expression comes from an elite group of fighter pilots that were formed in the Vietnam war in 1966 to combat increasing losses from Soviet SAM (Surface-to-Air) missles. The mission of the Wild Weasel was to to fly ("troll") ahead of incomming F-105 Thunderchief formations. In essence, the mission was to trick the VC (bad guys) into thinking that the WW (Wild Weasel) was an attaching Thud, when they targeted the Weasels, they would initiate a tactical manuver to hit the SAM site with a radiation seeking missle.
The term YGBSM comes from one of the original briefings when a weasel pilot stated, in content "You're telling me that I have to fly downtown Hanoi, with one bullet, and I can't shoot at him until he shoots at me..... you gotta be shitting me" --- YGBSM

In memory of the Weasels -- my beloved father Lt. Col Larry W. Biediger (KIA) , his weapons officer, Claude Silva (KIA), and Col. David Everson (USAF RET)

YGBSM-Weasels

YGBSM by thuddriver1 October 6, 2009

YGBSM

During the Viet Nam war, US pilots were getting shot down because of surface to air missile SAM sites. In an effort to counter-act the losses, the USAF came up with a tactic called the hunter-killer team concept. This tactic required a pilot, the hunter, to fly low over an area of suspected SAM sites in order for the sites to start shooting. Once the SAMs started shooting, pilots in follow-on aircraft, the killers, dropped bombs and fired missiles to disable the SAM site. When told of the new tactic at a pre-brief, one pilot was reported to respond, "You've gotta be shittin' me!" The term is associated with Wild Weasel pilots who flew F-105s, F-4Gs, and currently F-16s.
Currently, the term is used as an exclamation of shock or disbelief.

"Hey, dude, I heard there was another hurricane headed towards NoLo"
"YGBSM!"

YGBSM by YGBSMM May 21, 2007

ygbsm

you gotta be shittin me

boss---you need to (insert the impossible here)

employee---ygbsm

ygbsm by client 69 March 26, 2008

YGTBFSM 

YGTBFSM: Acronym for "You('ve) Got to be Fucking Shitting Me". Likely military origin.

Troop 1: We're getting recalled for a squadron-wide piss test.

Troop 2, just returning from Amsterdam: You've got to be fucking shitting me (YGTBFSM).

YGTBFSM by poopoopeepeedaddy December 19, 2013

ygtbkm

You've Got To Be Kidding Me. Used by people on AIM, or other types of instant messengers.

cutegirl598: josh asked me out last night!!!

em0chick: ygtbkm!

ygtbkm by dYl@n$gIrL July 28, 2007