Babysitting

Babysitting (noun): The often humorous misnomer used by parents when they're actually just doing their regular parenting duties. Commonly applied when one parent takes sole charge of their child while the other is out, reinforcing the age-old joke that parenting can sometimes feel like a part-time gig.

Friend: What are you doing this weekend?
Parent: Oh, you know, babysitting. My wife is going out, so it’s just me and the baby gearing up for a wild night of cartoons and cheerios.