'Gooo goo ga ga' (or goo goo gaa gaa), is a stereotypical baby 'talking'. When a baby says 'goo goo ga ga', it is usually considered humerous. However, I don't know if babies actually ever say this phrase.
The noise of an annoying baby, could be a babygirl, a babyboy, or your 4rth grade classmatetrying to be funny but failing miserably... or maybe a Lady Gaga joke.
I saved my neighbours children from a goo goo ga ga launcher
I was bored so I tried to be a goo goo ga ga launcher
My city is polluted with goo goo ga ga launchers
originally brought into use by the beatles. can mean whatever the hell you want it too. vaugly similar usage as wordall your base are now belong to us/word