To educate; used as a way to tell someone that they are ignorant, go look this shit up and get your shit together!
The confederate flag is racist; next time, learn up, before you post your support of a racist flag.
Used to inform a person that they must acquire more knowledge in order to be less ignorant on a specific subject.
This phrase is primarily used in the social justice circles.
Prejudice + Power = Racism — Learn up.
“Learn up” is attributed to Xavior Linko-Looper