A rhyming
slang for taking a poo.
For al those retar- I mean,
people - who mistake number 3 for number 1, it's a rhyming
slang. Number 3 means to pee. Number 1 means none.
Little boy Johnny, went to the loo,
He
ate so much, he went for a number 2.
Little boy Johnny, got out of the loo,
He
drank so much, he suddenly had to pee.
So Little Johnny went there and
gone for a number 3!
Got it now?