what are those delicious pickled onions things called?

You know served with papdoms and kind of red/orange in colour with lots of sliced onions in it.

Someone told me you can buy it at the grocery store, but I can't seem to find them.

It's called pickle.  There are a bunch of different kinds; the one you are talking about would be an onion pickle.  You might be able to find it at a regular store but not always and they wouldn't necessarily have all the varieties. The most common are mango and mixed.  You would definitely find it at an Indian/Asian grocery.

Sometimes they might be called chutneys. Now I want some!

Just ask to buy some at your fave takeaway.

I've seen it called "chutney" more than I've heard it called "pickle"

When I hear pickle, I think of Branston Pickle..which is certainly not the same as the yummy goodness that comes with popadoms!

but mmm, now i want both! <3 Cheese and Pickle sandwich..and the UK has such better indian food than the US does!

A chutney is technically different than a pickle, although the terms are often used interchangeably.  A chutney is meant to be made fresh and eaten straightaway, whereas a pickle is made as a preserve and can be jarred and eaten over long periods of time.  Chutneys are also usually made of pureed vegetables/fruits whereas pickles usually contain more solid pieces.

Branston pickle is something completely different and is an English condiment, not an Indian one. 

Branston pickle is something completely different and is an English condiment, not an Indian one. 

haha, I know.... I was just saying that that's what I think of when hearing "pickle", since the two are SO different. (but both, equally yummy!)