tzinqueza.

Headword: 
tzinqueza.
Principal English Translation: 

to turn upside down; to turn something upside down (see Karttunen)

IPAspelling: 
tsinkesɑ
Frances Karttunen: 

TZINQUEZA vrefl,vt to turn upside down; to turn something upside down / se empina (T), lo pone en cuatro pies, lo empina (T) [(7)Tp.162,214]. M has this only with a sexual sense, for a man to copulate with a woman from behind, or for her to present herself for that purpose. See TZĪN-TLI, QUETZA.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 313.