Does anyone else find them hilarious or are me and my friend total idiots?
Quite possibly just my idiotic sense of humour but I've been randomly undoing the monotony of work today with a friend of mine who was obviously doing the same.
I particularly like 'You've opened your can of worms, now lie in it'
And 'It's all bathwater under the baby, now'
We also came up with some reverse idioms like 'Where there's brass there's muck' and compound ones 'Just do it, you might get run over by three buses that come along at once, tomorrow' and 'he wouldn't give you the water off his duck's back'.
'You're just biting around the bullet, now' 
They have their own subreddit so I am clearly not alone.