Messterday

A term used to describe the day of a brutal, painful hangover when you've finally recovered the following day.

The origin coming from the saying "I was a mess yesterday" when describing the day after a night of late partying, boozing, etc.

Luke: How was your weekend?
Joan: I went out all night on Saturday for my going away party and messterday I was just useless.

Messterday by Lrzewnicki October 8, 2013

messendays 

Days past during which no particularly amazing thing happened but which were nevertheless wonderful. These days are indelibly printed in your memory and usually took in place in the summer.

'That was a messenday' or 'Those were messendays'.

messendays by Olulabelle February 15, 2006