Ur mom jr.
Ur mom jr means your mom junior, This word can simply be used in different ways for example..
Karl: Hello! What was your lunch today?
You: Your mother junior.
Karl: Hello! What was your lunch today?
You: Your mother junior.
Ur mom jr.
Jr's Mom
a stupid fucking piece of shit who licks her sons asshole day and night
She's just like Jr's mom! A piece of fucking shit!