Having a nightmare. Being in a bad/awkward situation.
"I got fired in work then crashed into the back of someone when I was driving home. I've just been having a mare"
by supernovabelterchild July 10, 2009
Get the Having a mare mug.
Having a nightmare but in the day, so it's just a mare since it's in the day.

Basically, another way of saying you're having a living nightmare, ie you're in a really shitty situation.
Today's been AWFUL. I thought my English Literature exam was in the afternoon, but it was actually in the morning. I missed the exam, and now I've been told I've been held back. It's like all my exam-anxiety nightmares came true! I'm truly having a mare!
by Lefty Power 123 September 6, 2018
Get the Having a mare mug.
Messing up your hair, sometimes until it's big and fluffy Generally more for guys than girls
*runs hands through hair rapidly*
"I'm having a mare!"
by Fifihasherlife December 10, 2007
Get the having a mare mug.