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1.
(verb) To commit to a social engagement ahead of time only to back out at the last second
"Where is Mark?"
"He said he was going to be here, but he just called and told me he remembered that he got tired."
"Fairy, he is really natting out."
by McGee68er January 15, 2006

Words related to natting out

antonym: attend blow off nat out natted out renege