When Alice Cooper & his band wrote 'Schools Out' they came up with music & lyrics very quickly, but one line stumped them. The verse went;
Well we got no class
And we got no principles
And we got no innocence
........
They couldn't think of anything for the fourth line to finish it off so their producer Bob Ezrin wrote it down on his pad as a note which said 'can't think of a word that rhymes - need to come back to it later'
They never did, they just left it in as 'we can't even think of a word that rhymes'.