Originally Kevin the gerbil was (ITV's) Roland rats' best friend. These days it can be applied to anyone called Kevin. Although this conjures up the idea of a man called Kevin inserting a small rodent into his anal passage this is not entirely correct. Kevin the gerbil's are fun, friendly, and a bit of a jack the lad, they are usually the life and soul of the party
That Kevin the gerbil is a right laugh.
The first person called Kevin the gerbil apparently lives in the mountains of North Wales, although this hasn't been fully authenticated