The act of vomiting and laughing in the same instant.
A: You remember (unamed person) having that cold sore a while back? Herpes outbreak if you will?

B: Yes

A: Well I ran into (unamed person) on St. Patty's Day and saw the lady he was dating. She also had a rather large something on her upper lip.

B: I think I just upchuckled.
by 9yards April 09, 2010

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