Top Definition
A term used to describe the day approximately three days from yesterday, or, the day after tomorrow. with the word "tomorrow" being taken literally as "2-morrow" and thremorrow as "3-morrow". other spellings include: 3morrow , threemorrow.
Person A: "What are you doing tomorrow?"

Person B: "Idk, but thremorrow I am going to the skate park."

Person A: ""
by DaysOfTheWeek April 01, 2013

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