Harsh or biting sharpness of language or fealings - Acrimonious, acrimoniously, acrimoniousness.
Your acrimony has caused many a harsh situation in the classroom.
by Stephen Ross August 10, 2006
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A negative endorsement of a product, person, service , brand etc

the opposite of testimonial.
after a poor experience at a restaurant people often send out a stinging acrimonial using Twitter.
by enovapr December 13, 2009
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