Question

You're holding out on me.

general
formal
informal
substandard

Answer 1

Informal

Step-by-step explanation:

The best choice for this phrase would be informal language.

Informal language is a standard type of lingo used in casual and/or every day conversation.

Hope this helps.

Answer 2

This sentence would be informal. A more formal way of saying this would be. "Is there something you're not telling me?