There Was A Young Man Called Mike

There was a young man called Mike
Who said “I can do as I like”.
He two-timed his girl
(her name was Pearl).
She said “Mike, get on your bike!”

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The term To “two-time” is an informal way of indicating that someone has been unfaithful to their partner.
Again, the term “on your bike” is an informal way of saying “never darken my door again” or, to put it more bluntly “get lost”!