Named after the Pokémon Rattata, which is one of the most common (and annoying) Pokémon encountered in the wild.
That Simon is such a Rattata, I wish he would just leave me alone.
Being known to attack when making sudden sharp turns or riding a bicycle in tall grass, one can justify that this is one of the main reasons to why the teens of today are so irritated and, on occasion, extremely flamboyant (see 'scene kids'). It is also a major cause for severe mental disabilities due to the loud, sudden noises this creature brings when it appears.
*RING RING RING* A WILD RATTATA APPEARS!