Although Ice-O's fired, I'll have another fricking pet!

The story:

My band and I were rehearsing the song for a concert. I got all the chords and the rest of the words right until I got to THAT part--the part I could never quite figure out. Everyone started laughing at me, but I couldn't figure out why. I realised that "Although Ice-O's fired, I'll have another fricking pet" was not only really weird, but really wrong when our drummer, Eric screamed out the real lyrics. Eric seemed to be the only one of us guys to know the actual words, so we asked my dad. They all still tease me about it, and it's been around five years!