Place it immediately after the bad take in your edit, then follow it with Nelson Ha Ha, or lead in with Wrong Answer Game Show to frame the statement as a failed answer first.
About this sound
A 2.6-second Portuguese voice clip says, in translation, 'the dumbest thing I've ever heard,' spoken with a flat, unimpressed edge. It feels rude in a funny way, giving a foolish statement a sudden put-down that makes the listener laugh at how wrong it sounds.