cuixmo.

Headword: 
cuixmo.
Principal English Translation: 

It would not not be like that. It would not happen like that. (see Molina)

Orthographic Variants: 
cuix mo
Alonso de Molina: 

cuixmo. que no sera assi, o que no passaria assi.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 27v. col. 2. Thanks to Joe Campbell for providing the transcription.

Attestations from sources in English: 

Beginning with cuix, this may be a question rather than a statement.