A misspelling of the word birthday by some idiots.
Wow, it's your brithday? Happy BRITHDAY!!!!11111!!!!1!1!!1!11!!!1!!!
The act of getting rilly confused, vomitting, or mispronouncing of a word. Usually induced my extreme intakes of alcohol.
Friend1: Man, playing football is rilly confusing
Friend2: You must be having a borgasm or something, dude