Kid you not, I’m lit up as fuck,
He’s not joking: he is high as fuck. “Lit up” refers to being high, although the substance can vary from alcohol and weed to harder drugs like cocaine. This song by Buckcherry is about being high on the latter:
http://www.youtube.com/watch?v=cABZfkRcQ6A&ob=av2e Another possible meaning here is that he’s saying he’s high as fuck while the person he’s talking to (“Kid”) is not.
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