To disregard (something), to dismiss or ignore (someone), as unimportant.
Used other than figuratively or idiomatically: see brush, off. To remove something with a brush.
To refuse to own, or to refuse to acknowledge one’s own.
To repudiate any connection to; to renounce.
To detach (a job or process) so that it can continue to run even when the user who launched it ends his/her login session.