pipillotl nicnemitia.

Headword: 
pipillotl nicnemitia.
Principal English Translation: 

to be childish or do childish things (see Molina)

Alonso de Molina: 

pipillotl nicnemitia. (pret. pipillotl onicnemiti.) niñerear hazer obras de niños.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 82r. col. 2. Thanks to Joe Campbell for providing the transcription.