A Ruaraidh is a large scottish mammal, often found in search for Guiness. It can switch from nocturnal to normal in a day. This is a skilled and friendly creature that has the ability to recall hundreds of LOST episodes at any moment.
If you are planning to keep a Ruaraidh, make sure you let it out to play football alot.
Ruaraidhs also, strangely enough, listen to the same music as prepubescent teenage girls.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life

Hairy mythical beast. Dwells down plugholes to feast on giant spiders. Often works as a librarian or book-shop owner. closely related to Bill Bailey. If you see one, run away immediately. They are very dangerous and quick over short distances, as they have stump legs and run like pidgeons.