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The period of time that occurs during the events of Saturday Night and Monday (or sometimes even Tuesday) Morning that nobody has recollection of after the comedown/hangover of a big weekender. After unday, you will feel like you have lost a day that you could have legitimately used for sleeping or recovering for work/uni the next day but can't because that day seems to have dissolved into nothingness and you probably knocked yourself out for over 24 hours.
A: *wakes up* Man I feel like shit... what time is it? we've got to go meet up with Sasha
B: That was yesterday. It's Monday today. And we're late for Uni again.
A: Shit whatever happened to sunday?
B: It's not sunday, It's Unday.

Sunrise on Friday, dPercussion on Saturday, Rave Saturday evening, Afterparty on Sunday, then it's Bank Holiday Unday.
unday by rasfuk September 23, 2006
Related Words
unday • uday • Ungay • unda • undyne • undate • Ungayed • undateable • Udaya • Udayan
Undyne is a badass woman who can flex a rock for no reason!
Undyne is undying!
undyne by Undertale Flowey April 3, 2016
A lesbian warrior fish from a game called Undertale.
Undyne is a fucking badass.
undyne by MrDeppresst November 14, 2018

undyne the undying

A badass that will kill you make you rage and brake your computer
Mom I broke my screen fighting undyne the undying
When you say something you regret saying and wish you could unsay it.
I wish I could unsay that your ass looks big in that dress.
unsay by Nonflyingfarang January 16, 2014
" that girl is so undyne
undyne by ewsaltyweeaboo January 3, 2016
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