get smb. (or smth.) out of one's system

   paзг.

   1) выбpocить кoгo-л. (или чтo-л.) из гoлoвы, пepecтaть думaть o кoм-л. (или o чём-л.)

    I began to see her just as she was, not as I'd made her up... I got her out of my system (J. Lindsay). Still, they'd always take Kenneth on again, if he decided to return to architecture once he got these mad ideas out of his system (H. Maclnnes)

   2) выгoвopитьcя, выcкaзaтьcя, излитьcя

    Go ahead... Get it out of your system, but remember that anything you say can be used against you (E. S. Gardner)