cast one's lot with

cast (one's) lot with (someone or something)

To join and steadfastly support another 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 with us. Don't worry, mom—I really don't care about casting my lot with the cool kids at school.
See also: cast, lot

cast one's lot with

Also, cast or throw in one's lot with . Join or side with, no matter what the outcome, as in Bill cast his lot with the new company. [First half of 1500s]
See also: cast, lot
References in periodicals archive ?
One cannot in one motion cast one's lot with the unprotected.
But it would be a mistake to cast one's lot with the minority of readers willing to pay for online news, while ignoring the major transformations happening around us.