When you post a thread on a forum which had a similar topic already posted.. but you just know that THIS one should be posted separately for the whole forum to see...
you just use this acronym "Idiot" instead of typing a long sentence.
For extra LoLs you can start a thread about a stupid thing
which will resemble with the true defenition of idiot.
The rest of the Forum: "LAWL DAT SI GUD!"