to be shaken or stirred from a comment or event that someone has directed at you or someone else. Can be used in a tense where you put rattled with something that can be rattled.
i.e. you rattled my cage
Fabian: yo man, your a cheese ball Ryan: yo man thats not cool, im slightly rattled
Fabian: yo, im sorry man... JOKES your a whore
Ryan: stop rattling my cage bro