First stanza, third line:

RETARD no kutsushita o
"RETARD" should be "LIZARD." Thus:

LIZARD no kutsushita o
I have the lyric booklet, and it clearly reads リザード not リタード. I can probably upload a scan, if you need some sort of explicit proof. Speeking of which, I really should upload the kanji lyrics, while I'm at it.