buffoon, joker; or, something that makes someone laugh (see Molina)
"Laughable," "Lovely, Makes People Laugh," "Makes People Frightened," etc. Gran Diccionario Náhuatl entry for Tehuetzquiti, https://gdn.iib.unam.mx/diccionario/tehuetzquiti/62086.
See the two personal name glyphs for Huetzquiz in the Visual Lexicon of Aztec Hieroglyphs, which are both grotesque mouths with fangs. They could be funny or frightening, or both. These are very similar to the name glyph for the ruler Tehuetzquiti in the Codex Aubin (see Wikipedia, https://en.wikipedia.org/wiki/Diego_de_San_Francisco_Tehuetzquititzin#/m....)
Consider also: "Xolopi'tli (~ xolopitli, xolopihtli) 'idiot, fool'.... You can find the term in Frances Karttunen's Analytical Dictionary. For 'crazy' there's a (Zacapoaxtla) dialect term cua:(yo:l)quepi. Then there's Classical Nahuatl i:xtepetla for someone stupid, an ignoramus. Classical te:huetzqui:ti' is 'buffoon, joker'."
"A lot of the indigenous professors at IDIEZ in Zacatecas and I tease each other by saying 'tihuihuiti' or 'tihuihuitic.' Most of them are speakers of eastern (Huastecan) Nahuatl from Veracruz and we've all understood the phrase as either 'you are crazy' or 'you have already turned crazy,' but in a joking and teasing manner, obviously. I hope that helps!"