Another annoyance:

"First come, first serve."

That means that if you arrived first you're going to get put to work as a waiter.

What happened to "first come, first served"?

Maybe what is meant is "if you are the first to come, you are the first one we serve" ??

Sure, that's the intent, but look how the ignorant bastards have mangled it.

My kids have a habit of saying something happened 'on' accident instead of 'by' accident which doesn't sound right to me. I thought it was just them and some type of kid talk then I heard an adult the other day say it, so don't know whether it's an American thing or a regional thing??

I've heard of doing something "on purpose". Maybe it's related.

Yes, I think maybe that's where they get mixed up, but like I said I heard an adult say 'on accident' recently that's when I wondered if it's more widespread than I had thought. You would say 'by accident' wouldn't you?

Indeed and you are gonna sing for yer supper............thereby becoming a singing waiter.

I honestly don't know what I would say/have said anymore.

I know exactly what you mean.

They put that on letters from our school

Sorry!

On accident? Very odd. Do they say something is 'on the cards' or 'in the cards'? I'm thinking I might have heard Americans use the latter.

Survey sez...........ding, ding, ding- in the cards

I heard this method will be replacing the coin toss at Wimbledon next year.

I think I've heard both depending on context, but "on the cards" sounds more 'normal' to me. Linguistic background, western NY state with smatterings of Long Island and northwest states.