Green’s Dictionary of Slang

(US prison) to break into and rob houses while the occupants are asleep; thus bipper, scallybipper, a thief who specializes in this.

1968		in B. Jackson In the Life (1972) 88: Me and a friend was going to go up through Oklahoma bipping—scallybipping (burglarizing a house when they saw the wife out back hanging clothes). [Ibid.] 128: You go in there and ransack their house and get their money,... [the burglars are] known as ‘bippers,’ ‘scallybippers.’.
1971–2		C. Shafer ‘Catheads [...] and Cho-Cho Sticks’ in Abernethy Bounty of Texas (1990) 198: bipe, v. – to enter motels, apartments, and homes at night while people sleep, mainly stealing cash and jewelry: to bipe a home.