A term used to express shock or disbelief in a situation, person, or place. Usually refers to a scale of incredulity.
"I don't know what the hell is going on, but this definitely rates a ten on my What The Shit-o-Meter."
The level of shit a bloke gets into with his wife. Generally occurs after a night out on the booze with his mates and he gets home very very late.
Shitometer readings -
10/10 - roaring, you are in the doghouse!
5/10 - usually still at this level 5 days after peaking at 10/10.
3/10 - simmering and ready to erupt at any tick of the clock, the shitometer never goes lower than 3/10.
Mahalis 'Are we heading out tonight for a drink'?
Mohamed 'Sorry Mahalis, the Shitometer is roaring'!