"vavoywI' SoHbe'! qalobbe'!"
Translation:You're not my daddy! I won't obey you!
vavoy is first used in the "Family 1" unit, but not explicitly explained in the tips and notes there.
It's part of the vav lexeme which has quite a few sentences, so it's possible that you may not have been shown any of the handful of sentences that specifically have vavoy.
The suffix -oy is used more generally in the "Grandeur" unit together with -Hom and -'a', though as I see now, that unit has no Tips and Notes at all.
I'm glad you figured it out from context here; probably at least a brief note in the T+N for Family 1 would be appropriate, and Grandeur should get some T+N as well to explain it further.