Something done that is mean, cruel spirited, nasty, immoral, or basically against what a decent person would do.

Also what you call someone who does the above.
Jack stole $20 from Penny. It was all the money she had to last the week. What a low act.

Jack is a low act. He just spat on that new chick in his class.
by Audifred August 14, 2008
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