[blackbirdster]

As far the dictionary goes, that's true.

But "filons" is the imperative tense of a verb literaly meaning "let's run away".

And also "Fillon" is the name of a politician who was exposed for fraud while he was running for presidency. He was sentenced last spring, his name was all over French news for a while, and it became quite infamous.

edit, added more context

[wazoox]

Sure, but as I said "un filon" or "un bon filon" as meaning "easy money" is very common.