quick off the mark
Fast to start or try something, as in This physician is quick off the mark in trying the newest medications. This expression comes from various kinds of races, where mark indicates the starting point. It was being used figuratively from the mid-1900s on.
Words nearby quick off the mark
quick fire,
quick fix,
quick grass,
quick kick,
quick march,
quick off the mark,
quick on the draw,
quick on the uptake,
quick one, a,
quick response,
quick study