I just thought of this now, and it's my first time, so please go easy on me:

(In theme of Oo Ee Oo Ah Ah)

I told my gross bad Ape he may not use Big Missle
I told my gross bad Ape he may not be so gross
And then my gross bad Ape he said this phrase to me; He told me "Shut up, my trainer! I'm just here for the money! Shut up, my trainer or I will fart on you!"

In case you forgot, Please go easy on me. I never did this before. I also tought of the first song that came to mind.

Here's a hint-
after you finish writing the song, hum the tune- (Oo Ee Oo Ah Ah) in your head. Does the beat match? This would be a great song, if you matched the beat and let it rhyme. :)