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1.
between lunch and dinner; food
I ate lunner because I forgot to eat lunch.
by Meowy Meowster October 22, 2004
 
2.
A meal combining lunch and dinner. Similar to brunch.
A: "Would you like to meet for lunch?"
B: "Sorry, but I'm busy all morning, so let's make it lunner."
by Vikingess June 07, 2010