Angry, acid, and sharp in delivering argumentative replies: bitter; mean-spirited; sharp in language or tone.
Joey: Hey, if you wanna grab a bite before work we’d better get acrimonious.
[…]
Ross: Listen, if you don’t know what the word “acrimonious” means, just don’t use it.
– Friends (2003) Season 9, Episode 21; “The One with the Fertility Test” [No. 215]
Knowledge Guild 
Love your Seinfeld, don’t you? ;-)
It’s Friends actually. Or is my sarcasm-o-meter broken?
You are SO right – I must not have had my coffee when I wrote that – “Joey,” “Ross,” – what else could it have been. My bad.