Nat's Knapsack strap snapped Nat's nunchucks slapped a black Nat's girlfriend stooped & lapped Nat's nutsack came unwrapped Nat's teacher was carjacked Nat's hat is 1980s wack Nat's sister smoked crack Nat's Grandad killed Japs nope - I can't say that a few times quickly ... DAMN IT! .
I don't think that is how the song went. lol Your's is very clever. Try to say it without thinking so much about it. Let it flow. Need a good beat in the background. Maybe some bass. lol