I was walking on the web and came across this question:
What do you say we get out of here?
It's seems to me a tad slangy. I don't quite follow the structure of this sentence. It's like something is missing. For me, this sentence would sound more grammatically correct with "if". For example:
What do you say if we get out of here?
So, my question is: is it slang? When can we use "if" and when can we do without it?