A person who behaves in the manner the stereotypical dad would. This includes, but is not limited to, Hawaiian Shirts, dead memes, and the regular dad joke.

One need not be a dad to earn the title of "The Dadliest."
Paul: Guys, let's go get some food. I'm really hungry.
James: OH, NICE TO MEET YOU, REALLY HUNGRY! I'M JAMES! *dabs*
Tom: James, you truly are the dadliest of them all.
by akuwardmoments December 30, 2017
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Name you give to someone's cock that you think look like your dad's
Girl 1: Wow, this is a huge cock... It reminds me of my dad
Guy: Thanks
Girl 2: Yeah, he got the dadliest cock ever
by SυιfΛrΙΘΠs--LΞ-VΞLυ November 15, 2017
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