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1.
To meet up with other dads and their children.
Hey Mark, I’m heading over to Rocketship Park with the kids around noon. You wanna’ dad up?
by DondoJeff April 11, 2010
10 1
 
2.
To fulfill your responsibilities as a father, despite your insecurities or level of parenting experience.

Derived from the phrase “man up” meaning be strong, take control of the situation, without complaint or regret.
Bob: Margie is going out of town this week and I’ll have the kids all by myself. I don’t know what I’m going to do.

Tom: Come on Bob, dad up. You know you can do it.
by DondoJeff April 11, 2010
4 0