Dictionary skills

Aisling has been on a roll this morning, annoying the living woo out of me and Meelyn. She enthusiastically jumped on me (or maybe "ambushed me" would be a better term) for a hug and nearly dislocated my jaw with her shoulder, so now she's sitting at the dining room table, sniffling, and writing down the definitions to several words, among which are:

1) irritate

2) pest

3) nuisance

She just told me that the definition of "pest" is "someone with a happy, joyful heart. Like me."

I'm not sure what dictionary she's using, but I don't think that's quite right.