this is it

== English == === Phrase === this is it Used to indicate that something important has finally happened or is about to happen. Used to acknowledge the limits of something. ==== See also ==== that's all that's it this is the life === Further reading === “this is it”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present. “this is it” in Longman Dictionary of Contemporary English, Longman.