1. When a person complains in a status post about how someone/something is stupid, but they misspell their text; most ironically, the words "stupid," "intelligent," and "educated" are most often misspelled in stupdi posts.
2. A person who makes a stupdi post is considered stupdi themselves.
User 1: "haaaatez how no1 cann speel n dey all wana say im so dumb but u btichez cant evn spel so idc whut you sayin~."
User 2: "You tell those stupdi btiches. You tell them good."
When something is excessively stupid, the word is misspelled as 'stupdi' to emphasise the stupidity.
"I don't want to talk about it, the whole situation is stupdi"