1. A person who is a legitimate idiot.
2. An idiot who uses 'legit' way too often.
(A Combination of 'Legit' and 'Idiot', pronounced.. legit..iot.)
"Man, look at her! She's a legidiot!"
"That's the 423809th time you've used 'legit' today, you are officialy a legidiot."