trampoline effect
n.— «Wood bat advocates are concerned that balls hit off metal bats are subject to what is known as a trampoline effect: When a ball hits a wooden bat, the ball compresses at the instant of impact and loses much of its energy. With a metal bat, the barrel is compressed by the ball. The bat can act like a spring or trampoline in driving the ball, which loses less energy.» —“Dealing with a batty situation: Wood vs. metal” by Jack Carey USA Today June 3, 2007. (source: Double-Tongued Dictionary)
Further reading
Jimmy from Shenandoah County, Virginia, says whenever a moth flew into the room, his mother would yell “Cattle bat!” This term is almost certainly a variation of candle bat, a folk term for moths found in various English dialects. In Caribbean...
A Navy veteran recalls hearing the Southern expression fat lighter from his wife’s family in Troy, Alabama. It denotes an old, resin-rich pine wood that becomes highly flammable as it ages. Fat lighter is prized as kindling and often called fat...