the sound made when receiving a GoogleTalk message.
"I wasn't at my computer, but I heard a Googlefart so I checked to see who sent me a message."
A Googlefart is a fart that appears to search out victims. Normally a Googlefart will attack you when you enter someones bedroom first thing in the morning or perhaps it will be lurking in a lift / elevator waiting for its next victim
Watch out ! Some cunt's dropped a googlefart in that lift.