wignorant

willfully ignorant-- ignorant meaning uninformed, not stupid-- but it IS a bit stupid to be "WIGNORANT," especially someone is trying to help you out

I tried to tell my friend about how continuously using one's device while it is charging runs the battery out quickly -- but they remained Wignorant.

Wignorant

Wignorant-- it's a portmanteau of
Willfully ignorant

My friend was wignorant as to socially unacceptable phrases/ words