cast lot in
cast (one's) lot in with (someone or something)
1. To join another person or become part of a group. Don't worry, Mom—I really don't care about casting my lot in with the cool kids at school.
2. To give one's steadfast support some person or group. As soon as news of the CEO's scandal becomes public, I doubt that big investor will want to cast her lot in with us.
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.
cast one's lot in (with someone or something)
to join in with someone or a group. He cast his lot in with the others. She cast in her lot with the others. She cast in with a questionable crowd.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.