big ol’ birthday fart
The result of a person whose birthday it is eating everything under the Sun that will improve their chance of blowing a huge, incalculable volume of flatulence onto their heavily candled cake in order to quell all the candles with a single, window-rattling flutterblast.
Yup, as we all stood together ‘round the cake, we were suddenly blown right off our feet by Grandpa’s big ol’ birthday fart; he’d been workin’ on that thing for days.