We found one dictionary that defines the word sunk up:

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1. sunk up: Wiktionary

▸ Words similar to sunk up ▸ Usage examples for sunk up ▸ Idioms related to sunk up ▸ Wikipedia articles (New!) ▸ Words that often appear near sunk up ▸ Rhymes of sunk up ▸ Invented words related to sunk up