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Noun. Shortened version of "tomorrow morning," but its use is also similar to that of tonight. Can also be used in the sense of "this morning," although such use is less common.
Anytime the day before, from after noon until midnight (or later, depending on location and preference), you may say, "What are you doing tomorning?" --What are you doing tomorrow morning?-- or "Hey, can I catch a ride to work with you tomorning?" --Hey, can I catch a ride to work with you tomorrow morning?--
During the wee hours of the morning, you can say, "I am going to school tomorning." --I am going to school (later) this morning.-- However, this is not a commonly used form of the word.
by Erwin "Dan" Dunbar November 24, 2006
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Popular Shortening of "Tomorrow Morning", primarily used in South East Anglia and London.
"I will pick you up in tomorning."

"Tomorning is the begining of the first day of the rest of my life."

"Although it after midnight, tomorning you may open your presents."
by TigerMan August 15, 2012
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The verbal confusion of the words "tomorrow" and "this morning" when speaking past 12 AM where it is technically morning
Person 1: Man it's late, it's almost 2 o'clock!

Person 2: Yeah I'm tired. What are our plans for tomorning? I mean tomorrow. I mean, this morning.
by GF2themax January 02, 2010
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Noun. Shortened version of "tomorrow morning," but its use is also similar to that of tonight. Can also be used in the sense of "this morning," although such use is less common. See also tomorn, tomornin and tomornin'.
Anytime the day before, from after noon until midnight (or later, depending on location and preference), you may say, "What are you doing tomorning?" --What are you doing tomorrow morning?-- or "Hey, can I catch a ride to work with you tomorning?" --Hey, can I catch a ride to work with you tomorrow morning?--
During the wee hours of the morning, you can say, "I am going to school tomorning." --I am going to school (later) this morning.-- However, this is not a commonly used form of the word.
by Erwin "Dan" Dunbar November 14, 2006
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slang for tomorrow morning... used in a similar manner as the word "tonight".
Don't bug me now, I'm tired, I'll do it tomorning.
by B-Rad-BOE November 10, 2010
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