I wait till the end and say
'yeah, that's why I didn't ask you'. Or at least, I do to my Dad, he's an insufferable know-it-all.
( Captain Wow currently being a cunt in Infamous, Fri 5 Jun 2009, 16:39, archived)

"It's a good thing I didn't ask you then, because your advice is complete bollocks."
Works too.
( Lord Gnome, Fri 5 Jun 2009, 16:40, archived)