Smell a Rat – fell that something is wrong
Go to the dogs – become run-down
Fishy – strange and suspicious
Take the bull by the horns – take decisive in a difficult situation
Horse of a different color – quite a different matter
Let the cat out of the bag – inform beforehand
For the birds – uninteresting and meaningless
Straight from the horses mouth – from a reliable source
Horse around – play around
Cat got your tongue? – cant talk?
