>>1094286Different anon --
Desu is an automatic word filter that gets applied when you type the three letter abbreviated form of "to be honest".
There are a few other filters too, like how the first three letters of Onions get changed to onions.
Some of the filters are just a bit of fun from the previous admin, while others were brought in to combat/punish certain slang terms being overused by offsite tourists and shitposters.
