"Gabagoo" as a history of being offensive sometimes and elegant, it was popularised by the second roman emperor "Gabagus" which used it as a filler for words that he could not remember "I talked to Biggus Dickus the other day and he gave me the uhhh Gabagoo"
Teacher:"does anyone know why the roman empire fell?"
Student:"yeah!! It was because of the uhhh Gabagoo"
John:"Ayo bro you seen my gabagoo?"
Bro:"yeah i think it was behind the gabagoo"