back on one's bullshit

== English == === Verb === be on one's bullshit (third-person singular simple present is on one's bullshit, present participle being on one's bullshit, simple past was on one's bullshit, past participle been on one's bullshit) (originally African-American Vernacular, colloquial, derogatory) To behave in a characteristic, typically negative way. ==== Usage notes ==== Often with back, as in “be back on one’s bullshit”.