0 to make a sound like that made by a car horn (= a device that is used to make a noise as a warning or signal to other people): --
Car horns parped in celebration.
1 a sound like that of a car horn (= a device that is used to make a noise as a warning or signal to other people): --
a parp from the referee's whistle
Teletubbies make a parp sound when knocked over and a whee sound when picked up again.
Two brass players parp behind the pillars at the back of the church.