A secondary account for when you already have an existing primary account for most commonly, but not limited to, an internet forum.
A rudeboi account is created for committing acts of 'rudeness' aka trolling which you would otherwise not use your primary account for incase of a ban, (note that acts of rudeness are limited to a sub-IP ban level) or you're to scared to post the matter at hand on your main account in fear of what other people have to say, so a covert means of posting is required.
Big Ron: I'ma go be rude on ye olde forums
Sneaky Jim: I SURE HOPE YOU'RE USING YOUR RUDEBOI ACCOUNT! BBQ RIB AMIRITE?
Big Ron: def
Poopin' Jack: I'm worried if I post this subject of high personal importance people will be angry and flame me. Better use my rudeboi account!
THIS IS A VERY RUDEBOI TING RIGHT HERE. DONT mess with this girl because she will get here dad to cut you down. She is a newbie to the roadman community because shes only killed one person so far. Her weapon of choice is a shank, of course, and she likes to beat people up for fun. She is also nicknamed potato mother because of her love of potatoes. SHE WILL SEND YOU TOE PICS. Her main gs are tilly nice, aiden bentley and Julio.
Roadman 1: did you hear who rudeboi Romily b killed yesterday?
Roadman 2: ye I cant believe she only killed one.