Both my Grandma's were both called Grandma... and both Grandpa's where Grandpa.
My aunt is Mema to her grand kids, my mom goes by Nana or rather will go by Nana since Eden does not speak yet, my friends Gma is Uma, my other friends gma is Ma or Mom (She was raised by her grandmother), and my other friend calls her gma Nani.
Sorry had to include those since mine were traditional...
I call my Mom Crazy Lady, but out of deep respect and jokingly of course, if it bothered my mom, she'd tell me. But between yous guys, me and the sewing machine, she is a little batty... lol :P