ignorant and uneducated.
"the new religion was first promulgated by rude men"
referring to a taboo subject such as sex in a way considered improper and offensive.
"Graham giggled at every rude joke"
(Gif: Ok Taec-yeon)
A kid that called me ugly after I asked him to a dance YOU KNOW WHO YOU ARE AND I'M STILL MAD
You are a rude piece of rubbish for judging by looks and I hate you.
Rude is when a person acts in an unpleasing manner or is mean.
"I got bullied at school every day. The bully was so rude.
"Oh Lola, stop being rude to your brother"