Top definition
A Mum (or Mom for yanks) who offers unsolicited and usually negative advice to the umpire while watching their child play sport.
I wish Meryl would learn the rules before she decides to mumpire.

Meryl should stop mumpiring, its embarrassing for the rest of the parents.
by G-reg tdog March 30, 2017
Get the mug
Get a Mumpire mug for your bunkmate James.