Don't you often think we say some STUPID things. Here are a few that make me laugh:
What's up with you? (why ask want's UP, when it's obvious I'm DOWN?) :
Can you give me a hand? (yeah, I can but if I do I'll struggle helping you with just the one I've got left)..
...which brings me to ....
I've got one left (good for you...I've got one right)
...and....
Are you allright? (Does it look like it to you? Am I not half left?) ???
I'm gutted! (disgusting if you think about it!!)
They are having a bit of a ding-dong (are they playing with the door bell then?) ???
He's a bit of a .....so and so (a bit of? And what about the rest?)
He's had it this time... (well, if he's already had it, why are you still going on about it?) :P
I can't stand her (so sit down then)
Look forward to hearing some more. The best are the most common, We don't even realise the literal meaning of some of the things we say, do we?