A shortened term combining tomorrow and morning, usually used by illiterate students.
Tyrese: "Yo, Miss Smith, can I turn in this paper tomornin'?"

Miss Smith: "Sure, Tyrese. Whatever. Just don't shoot me."

Tyrese: "Aight."
by Rob and Jenn November 18, 2007
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The wonderful time that comes between midnight and 6am, it's after midnight so not technically night, but it's before daylight, so not technically morning. Also it's technically tomorrow, hence: to-mornin'
By the time they finished drinking and dancing at all of the local bars, it was tomornin'.
by hawnasay November 13, 2006
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"Talk to you tomornin! Hope you have the coffee ready!"
by LuckyLyle July 26, 2017
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