To make a sputtering noise by pressing the tongue and lips together. It can be used to express either real or faux contempt, mockery, or displeasure, or as a playful gesture toward babies or young children, who may repeat it. Jacqueline quickly blew a raspberry at Dave after he made fun of her new haircut.Tara loves hearing her baby boy giggle when she blows raspberries on his tummy.
(British & Australian informal) alsogive a raspberry (American informal)
to make a rude noise by putting your tongue between your lips and blowing (often + at ) A boy of no more than six appeared, blew a raspberry at me and then ran away.