Simple past tense and past participle of sag.(verb)
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Use "sagged" in a sentence
"There were pouches under the eyes, the skin sagged from the cheekbones."
"A twisted and wizened complex of apish features, perforated by upturned, sky-open, Mongolian nostrils, by a mouth that sagged from a huge upper-lip and faded precipitately into a retreating chin, by peering querulous eyes that blinked as blink the eyes of denizens of monkey-cages."
"As I handed her the cage, I saw the way her gown sagged from the weight of opals."