weigh-in

(wā'ĭn')
n.
An official weighing of the participants in an athletic contest, such as in a boxing or wrestling match, in order to ensure that they weigh within the limits stipulated for the event.

Be weighed; also, be of a particular weight. For example, Because it was such a small plane, the passengers and their luggage had to weigh in before takeoff, or The fish weighed in at 18 pounds. [Late 1800s]

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