Ogden Nash, who wrote the one about the number of Ls in various lllamae above, added a footnote to this poem(?) in one of his verse collections:

The author's attention has been drawn to a variety of conflagration known as a three-alarmer. Pooh.

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Mary had a little lamb, With green peas on the side, And when her escort saw the check The poor boob nearly died.

And another variation of one above:

Mary had a little plane. Around the sky she'd frisk. Wasn't that an awful shame, Her little *

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The common cormorant, or shag, Lays eggs inside a paper bag. The reason you will see, no doubt: It is, to keep the lightning out. But what these unobservant birds Have never noticed, is that herds Of wandering bears may come, with buns, And steal the bags to hold the crumbs.

Christopher Isherwood (& also posted here in slightly different form)

(Dilly, dilly, piccalilli, tell me something really silly. I had a friend, his name was Bert. He ate the buttons off his shirt.)

The preview says my linebreaks have all disappeared into Cyberspace.