"wrap it up" is a correct and usable phrase in written English. It is often used to express that something needs to be brought to a close. For example, you might say "It's getting late, so let's wrap it up and call it a night".
Geez, Poland, wrap it up!
"It's time to wrap it up".
Q: Mr. Perot, can you wrap it up?
ALISON BEARD: Dan, should we wrap it up?
Trevor Rosenthal looks to wrap it up against Mark Ellis.
It's a good story and I wrap it up neatly.
1am: Time to wrap it up for the evening.
If you wrap it up tight, the integrity is ruined".
These bogeymen wrap it up in a complete package.
4.19pm GMT Summary I'm going to wrap it up there.
Wrap-It-Up Early Sale".
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK