dad friend; father friend
A casual term for a male friend who is also a father, often met through children's activities. Used in parenting contexts.
I made a dad friend at the nursery school.
On the weekend, I went to the park with a dad friend and our kids.
A modern compound of パパ (papa, 'dad') and 友 (とも, 'friend'), modeled after ママ友 (mama-tomo, 'mom friend').