What is the answer to "Not on the up and up, slangily" in the NYT Crossword?

The answer to the NYT Crossword clue "Not on the up and up, slangily" is SUS (3 letters).

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Not on the up and up, slangily NYT Crossword Clue

Down clue · from the December 23, 2025 puzzle

Stuck on “Not on the up and up, slangily” from the New York Times Crossword? Here is the verified answer:

Answer

SUS

3 letters · Down · last seen December 23, 2025