gdo 

The device used to open the iris on the Stargate. By entering a sequence of numbers into the keypad, the device transmits the identification code, or IDC, through the Stargate via radio waves to inform Stargate Command that there are friendly targets incoming.

Upon receiving this signal, the SGC has the choice of either sending a 'go' or 'hold' code back to the GDO. The former indicates that travel to Earth is safe, while the latter indicates that the arriving SG team should hold their position due to some difficulty.

The GDO was referred to earlier as simply a "transmitter". The acronym GDO stands for "Garage Door Opener".

Teams returning through the Stargate to Earth use their GDO to identify themselves as friendly.

gdo by Tim Kedojeh January 19, 2005

GDO 

An acronym standing for God-Damn Ouachitonian.

Traits include, but not limited to: Comfort-colored shirt, chacos with jeans (with socks), and/or holding a HydroFlask. May also include light hypocrisy and lukewarm Christianity.

“Josiah sent me *another* out-of-context bible verse, what a GDO.”

GDO by westchestermansen February 27, 2019

GDO 

An abbreviaton meaning "Get Dumped On" used when in competition with someone or to be yelled at defeated opponents.

*In Call Of Duty*
Eric: Prepared to GDO

*Final Kill*
Eric: You just Got Dumped On

GDO by Pwnstheface May 19, 2011

GDO 

Acronym for "Gays Day Out."

"Danny, let's go shopping and have lunch with the boys. It'll be a GDO."

GDO by DJ Andre October 15, 2009

GDO 

"Get Dicked On"

"Gdo your weak."

GDO by DefinedWords October 17, 2016

GDO 

Simply meaning "Get Dosh Out". As whereby someone will withdraw from their bank via an ATM.

"Hey, where are you going?"

"Im just going to GDO see you in a fiver"

GDO by Teemac848484844 January 14, 2008

Gdo 

"Greatest Dude Overall"

"Im the gdo bro."

Gdo by DefinedWords October 17, 2016