tops
Tops (adv) means At the most; as an upper limit (informal). Example: “We'll need an hour to finish the painting, tops.”
How to use tops
Learner’s notesIn plain EnglishInformally, "at most" (twenty minutes, tops) or "the very best" (she's tops).
Casual, spoken usage — not typically used in formal writing.
Fill the gap
Can you complete this real example?
We'll need an hour to finish the painting, _____.
Etymology
Likely formed from top plus -s, used as a diminutive.