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.
Have you meet John? Hes a Ruaraidh when it comes to LOST.