The Collaborative International Dictionary
Gadding car
Gadding \Gad"ding\, a. & n. Going about much, needlessly or without purpose.
Envy is a gadding passion, and walketh the streets.
--Bacon.
The good nuns would check her gadding tongue.
--Tennyson.
Gadding car, in quarrying, a car which carries a drilling machine so arranged as to drill a line of holes.
Wiktionary
gadding car
n. (context quarrying English) A car which carries a drilling machine so arranged as to drill a line of holes.