be on one

verb

Behave in an irrational, aggressive, or eccentric manner.

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Meanings

verbbe on one (third-person singular simple present is on one, present participle being on one, simple past was on one, past participle been on one)

present singular third person is on one · participle present being on one · past was on one · participle past been on one

  1. slangBehave in an irrational, aggressive, or eccentric manner.

    Janine: Oh, see you, Gregory. Goodbye, Mr. Johnson. You know what? I'm just realizing I don't know your first name. Mr. Johnson: When you get home tonight, look up in the sky. It's written in the stars. Gregory: He on one today.

    2023, Brittani Nichols, Abbott Elementary, season 2, episode 22, spoken by Gregory Eddie (Tyler James Williams)
Cite this entry
APA

be on one. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/be%20on%20one

MLA

“be on one.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/be%20on%20one. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “be on one,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/be%20on%20one.

Source: be on one on Wiktionary, CC BY-SA 4.0.