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If you're plentiful and full, you could say you're plump or full figured... in other words, you're not a snack, you're the Whole. Damn. Meal.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
She has full breasts and always has lovely cleavage.