It's a way of telling a person (in a way of a threat), that they "will see." Meaning there will be an outcome and you might regret it.
Synonyms for You will see
On this page, you will find 30 slang terms related to you will see. Some of the top words include: whoa please dont.........thanks, mugging, Iraqi Information Minister, Bar, what the beebo?, and 25 more.