To stick out ones tounge and blow in a manner which is meant to put down someone of a lower class whom u just beat in some sort of event, be it sports or some silly anecdote.
Fran blew a large rasberry at billy as she walked away, victoriously, from thier checkers game.
And dying in yo' bed many years from now, would ya be willing ta trade all da days from dis here day ta dat fo' one chance, just one chance, ta come back here as young men an' tell our enemies dat dey may take our lives but dey will never take our freedom ... YUB NUB!