That's what I do I smoke meat and I know things T-Shirt
Way back when, teams/managers realised that by making substitutions towards the very end of the match, they could run the match clock down with no play occurring. This got fairly silly - players would dawdle off and onto the pitch as slowly as they dared, people got a bit fed up with how blatant it was, and the only option available to the referee was a yellow card for time-wasting.
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