Pull the other leg/one (it's got bells on)!

something that you say in order to tell someone that you do not believe what they have just said.

Helen, going rock climbing? Pull the other one - she can't even climb a ladder without feeling sick!

• God forbid
• God-given right
• God help
• God help someone
• go down a treat
• go downhill
• go down in flames
• go down in history
• go down in the world
• go down like a lead balloon
• go down like ninepins
• go down that road
• go down the plughole
• go down the tubes
• go down the wrong way
• God rest her soul.
• God rest his soul.
• God rest someone's soul
• God rest soul
• go Dutch
• go easy
• go easy on
• go easy on someone
• go easy on something
• goes for