to suck someone’s finger (see Karttunen)
MAHPILPIPITZOĀ vt to suck someone’s finger / lo chupa a un dedo (Z) [(2)Zp.39, 189]. See MAHPIL-LI, PIPITZOĀ Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 131.