shake on it/on something
shake on it
To confirm an agreement with someone by shaking hands. I can't believe he broke his promise to me after we shook on it and everything! I agree to the terms of this deal, so let's shake on it.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
shake (hands) on something
to clasp and shake the hand of someone as a sign of agreement about something. The two people didn't sign a contract; they just shook hands on the terms of the agreement. I think it would be better to sign an agreement than just shake on it.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
shake (hands) on it/on somethingshake hands with somebody to show that you have made an agreement, a deal, etc: ‘OK, I’ll let the car go for $5 000.’ ‘Do you want to shake on it?’ ♢ Let’s shake on it.
Farlex Partner Idioms Dictionary © Farlex 2017
To make some agreement binding by shaking hands: Our negotiations went well, and we soon shook on the deal. If you're satisfied with the arrangement, let's shake on it.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.