champepiar

An extremely rare, poorly documented Central American colloquialism — it surfaces in the Diccionario de americanismos' cross-reference lists alongside champar (to reproach someone to their face) and champear, but without a clear standalone definition even in specialized regional dictionaries. If it's attested at all in speech today, it's vanishingly rare; a learner is unlikely to ever need it.

• Le champepiaron por no haber avisado a tiempo. — They called him out for not having warned them in time.
• No es para tanto, no me vengas a champepiar. — It's not that big a deal, don't come at me like that.
• Se pasan el día champepiándose el uno al otro. — They spend the whole day sniping at each other.

Treating champepiar as a word an average Spanish speaker would recognize — it doesn't appear in general dictionaries, only in specialized regionalism references, and most native speakers (including in the countries where it's attested) won't know it either.