When you start typing a reply, then change your mind halfway through and
delete it.
Started on an internet forum by a member called
withnail. He asked if anyone had ever started typing a reply then given up halfway through.
The answer was yes.
And such the term "
withnailed" was coined and has spread since.
Troll on a forum, starts a game
console war.
You've
typed up reply and are just about to hit the submit button, then you think "
fcuk it" and delete and simply replying with "Withnailed".