blowing raspberries

it means to place your tongue between your lips and blow.Blowing raspberries is usually used as an insult and way of taunting or a gesture of disrespect .If somebody blows raspberries at another guy he is mocking him and it`s like telling him he is a loser and a sucker.In many cartoons you can see a character who blows raspberries at other characters and this is how he mocks them and taunts them.The little children are also taunting blowing raspberries at each other.The blowing raspberries insult is very similar to the British taunting called cocking a snook in which the thumb of one hand is on the nose and the extended fingers are wiggled and the tongue is sticked out.