Okay, the "phat"ness and "Lean Cuisine" 2-line combination means that u attempted to bite of someone, not exactly me, and it wasn't successful. U r third person who tried to create a punch out of my name. The other two people created punches that worked. The part about me being afraid to know my name was a good opener, but u didn't follow through successfully on ur second line. Therefore making that a punchline.
The second pair of lines basically means that ur verse had a nursery-rhyme feel to it, putting the reader to sleep. There was nothing that made th reader say "DAMN" or "Ahh". Afta ur second line everything went downhill, which makes this a valid punch.