A phrase popularised by Australian YouTuber frezned. To be said ominously after saying something that has or has not happened. It has an even more powerful effect if you ask/bribe some friends/passers-by to shake their heads and tut immediately after you have spoken.
I haven't eaten marshmallows and ketchup since... the incident.
No one has seen Jennie since... the incident.
I've been wearing odd socks since... the incident.