A Japanese abbreviation used for Konami's Session Series, Guitar Freaks and DrumMania. Comes from the phoenetic transliteration into Japanese syllables ("GITAA FURIKUSU" and "DORAMUMANIA").
"Konami no GITADORA wa tanoshii desu."
"I love playing GitaDora, but I can only play the Gita part, because I suck at the Dora part.
It is an acronym that usually refers to the phrase "GOTTA TAKE A DUMP". This is only used in an emergency when you can no longer hold in your dump, and you do not have the time to write the entire phrase.