the.com/sag

Gravity's autograph on everything you once thought was permanent.

means To sink, droop, or curve downward gradually under weight, pressure, or lost tautness.

from From Middle English 'saggen,' probably borrowed from a Scandinavian source — compare Swedish 'sacka,' meaning to sink or settle down. It's an old sailor's and farmer's word at heart, used for drooping ropes, bending beams, and tired rooftops long before it described economies, spirits, or jawlines.

origin
old english seegan, meaning to sink slowly
physics
even steel beams sag under their own weight
pants term
became slang via 1990s prison belt restrictions
mattress tell
over 1 inch of sag means replace it
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