Top definition
A man who gets with a woman with children,like a microwave family, but she has kids with kids which makes her a grandma, so makes the man a grandpa like a quick meal in the microwave
He married into grandpahood. Just like a microwavable dinner hes a microwave grandpa
by Lola1109 August 21, 2017
Get the mug
Get a microwave grandpa mug for your dad Jerry.