Men who wear shorts that stop above the knee have a case of the dad knees. Mostly popular pre-2000's with middle-aged men (dads).
Billy had a growth spurt so we're taking him shopping for new shorts to cover his dad knees.

I can't find any decent shorts here because they're all dad-knee style. I don't even own boat shoes to go with them.

The 80's dad-knees style is coming back in a big bad way with hipsters.
by Faux Foe July 7, 2016
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A useless item. Something completely broken. Also not able to be fixed under any circumstances.
John: hey man I bought this new motor the other day and the gas tank is a 46 gallon fish tank man!

Bill: sounds pretty gay if you ask me.

John: shut up you couldnt afford it dude youre as broke as kyles dads knees.

Bill: yeah man i guess ur right.
by RickyRips January 31, 2018
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Some of the hottest things on the golf course and lake shore. Usually accompanied by some khaki cargo shorts. These knees belong to high school boys and actual dads alike and are nevertheless perfect. There’s just something about them, they aren’t too skinny, and have just enough definition to hint at the mussels in the strong dad legs. Such dad knees can be judged when owner squats down to appraise the green.
Golf Girl #1: Omg, did you see that guy in those khaki shorts?
Golf Girl #2: Are you taking about the kid with the banging dad knees?
GG#1: (blushing) Maybe…but I mean like…did you see them?!
GG#2: Yeah they were pretty…mmm mmm mmm!
GG#3: (walks up) Did you see those dad knees?
by trying_their_best May 19, 2022
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