I saw this comedy routine, and I did think it was very funny.  "Flops" is short for flip-flops, or a kind of beach sandal.  Kevin thought it was strange language for his boy.  The fact that his son was attending private school and had changed in a way that Kevin maybe didn't like is what made the joke funny.  It was not something he might have said before. 

You can see the whole skit here: https://www.youtube.com/watch?v=jH_OI3Sfo0U

Thanks Stephanie. 

I laughed.

I get the point now Stephanie.

Thanks for the help, and thank U all guys.

Now let me get my flops and take my boo to the beach.

Thanks !