To wait till the cows come home means to wait for a very long time, and in this context Dad is telling the speaker that they can wait for an indefinite amount of time.
Context: You can wait for an indefinite amount of time,' Dad smirked at me.
Hypothesis: ,'You can wait till the cows come home', Dad smirked at me”

Given this context, determine if the hypothesis is true (Yes, no, or unknown)?