grandma's shoes
Something that is comfortable, practical, and really stupid and/or ugly.
"I know this Snuggie is totally grandma's shoes, but I'm tired of my arms getting cold when I say that I'm reading but am actually watching Netflix all day."
Grandma Shoes
An Adjective for describing the highest form of bad assery.
"When I grow up i'm going to be Mexican, I'll get my first period that sh*t will be Grandma shoes."