full out

when you commit to something, whether it’s to a person or a diet, a lifestyle or the party.

you commit and there’s no going back.
similar phrases are; go mental, full on, go crazy, full send, send it.

person 1: are you ready?
person 2: of course, imma go full out on this shit!

running full-out

To run like Britney Spears (presumably when she was attractive) while being Neil Peart.

“Oh my god! He runs faster than Britney Spears! And she was running full-out!” - Originally uttered by an anonymous elderly female security worker for a Rush concert. This version of the quote is the one told by Mr. Neil Peart during an interview after some show, or something.

full out

full makeout but without sex

The boy went to fingerbash the young feminine girl but she went to full out.