Verb
be down with (third-person singular simple present is down with, present participle being down with, simple past was down with, past participle been down with)
(idiomatic, slang or African-American Vernacular) To be alright, okay, or in agreement with; approve of; stand for; accept as good, right, or preferred.
I am not down with you children bullying and disrespecting one another, so cut it out!
She can come into the VIP lounge, it's alright, because she's down with us.
Injuries is a part of a sportsmen life; you have to live with it. You can't be down with that; it is not gonna help you. Jeev Milkha Singh