be quick off the mark

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be quick off the mark

To be quick to react or take action. You have to be quick off the mark if you're going to be an emergency responder.
See also: mark, off, quick

be quick (or slow) off the mark

be fast (or slow) in responding to a situation or understanding something.
The mark here is the line or marker from which a competitor starts a race, as is also the case in get off the mark and on your marks.
See also: mark, off, quick

be ˌquick/ˌslow off the ˈmark

be quick/slow to do something or understand something: You have to be quick off the mark when you answer a newspaper advertisement for an apartment.Jenny was rather slow off the mark, and they had to explain the joke to her.
In athletics, your mark is your starting point in a race.
See also: mark, off, quick, slow