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1. to be a sport
2. to go along and do what you are supposed to
From Reservoir Dogs :

(talking about tipping and the fact that tips are taxed)

Mr Pink: (...) Look, if you show me a piece of paper that says the government shouldn't do that, I'll sign it, put it to a vote, I'll vote for it, but what I won't do is play ball. (...)

Meaning he will not do like everyone and start tipping waitresses.
by BelgianTake March 09, 2012
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May 18 Word of the Day
When you think up something brilliantly righteous while baked.
X: I had this great highdea last night
Y: You clearly were philosopher stoned.
by TripleWest September 03, 2012
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In a relationship in which one partner is polyamorous, the act of the monogamous partner allowing the poly partner to occasionally have sexual relations with other partners. Similar to a β€œhall pass,” it shows respect, trust, and mutual understanding between the partners. Those who refuse to play ball are frankly immature, possessive, controlling, and often abusive to their partners.
I thought I’d never get to hook up with Bella, but luckily her boyfriend decided to play ball. He’s such a cool and understanding guy.
by 0000101100101000010101011 January 11, 2021
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