When you leave 7up in the fridge for too long and it goes off.
The gone off 7up tastes like sick.
go mad; behave extremely strangely.
"they looked at me as if I had gone off the deep end"
When you leave sausages in the fridge for too long and they go off.
The gone off sausages taste like shit.
When you leave a courgette out for too long and it goes stale.
The gone off courgette is mushy.
When you leave chicken curry out for too long and it goes rotten.
The gone off chicken curry tastes like cat food.
When you leave the horseradish out for too long and it goes off.
The gone off horseradish tastes like a gone off white mousse.
When you leave lasagne out for too long and it goes off.
The gone off lasagne tastes like garbage.