burp 
(bûrp)
(bûrp)n.
1. A belch.
2. A brief sharp sound: the burp of antiaircraft fire.
v. burped, burp·ing, burps
v.intr.
1. To belch.
2. To make brief sharp sounds: "Radio noises burped from the front of the cabin" (Jonathan Kellerman).
v.tr.
To cause (a baby) to expel gas from the stomach, as by patting the back after feeding.
[Imitative.]