When you stick up your middle finger and do the "up your ass"
Motion at the same time - use only when someone has truly pissed you off.
"I was walking on the sidewalk to get some food and there was a 40 year old lady screaming at me that I was living a life of sin. So I gave her the ole' one two
by Toon_Link_GotT September 8, 2016
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