Snot good 

Usually preceeded with a look of disbelief or a headshake used to determine immediate disapproval from one friend's actions to another
The opposite of its all good or all good

Friend 1: Hey dude I totally had a meaningless hookup last night!
Friend 2: OH fr? (That)Snot good bro...
Friend 1: what about that hooked you picked up the other week?
Friend 2; That)Snot good either

Snot good by Snot good July 28, 2021

That's not a good sound... 

phrase used by Dr Horrible and can be used when an unexpected sound occurs

'Car backfires'

you: " that's not a good sound..."

That's not a good sound... by Death Knight Mordakai February 4, 2010