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Why do you say sleep tight?

Answer:

Answer

The phrase "sleep tight" originated when mattresses were set upon ropes woven through the bed frame.(before box-springs were invented) To remedy a sagging, uncomfortable matress caused by sagging and loose ropes, one would use a bed key to tighten the rope.

Means have a good sleep

First answer by Crazywowow. Last edit by Crazywowow. Contributor trust: 262 [recommend contributor recommended]. Question popularity: 6 [recommend question].