Top definition
a crabby old man who plays the piano and rocks out like no other grandpa can. usually tends to play country-ish/bluesy music, while screaming in a reeally loud and obnoxious voice.
a fictional character.
my grandpa blues can rock out better than your grandpa joe can.
common companion: grandma blues. just as cool, but is knitting away and clacking with those needles.
by grandpa blues November 16, 2008
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