blow a strawberry
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. It is more often called a "raspberry." Jacqueline quickly blew a strawberry at Dave after he made fun of her new haircut. Tara loves hearing her baby boy giggle when she blows strawberries on his tummy.