Mckeester Posted in M Best definition Mckeester The coolest person you know. Also know as “keesterer” or “rollerkeester” This person is a bamf. OMG DID YOU SEE THAT GIRL? SHE WAS SUCH A MCKEESTER!! How satisfied are you with the definition? Looking for Mckeester meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 60 times.