In this case, "still got it" means still possesses a particular desirable quality or qualities, still has a particular ability, etc. The uninflected form "get it" does not exist in this meaning (obviously it exists in other meanings).
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pshSo this is a idiomatic phrase, right?Yes, a special case of the expression "have got", referring to possession. (E.g "He's got two cars".)
rpshCould you show me more meanings of this phrase?"got it" can also be an inflection, in the usual way, of "get it". The most straightforward and literal meaning of "get it" is