Knowing that weekend becomes fin de semaine will only get you that far, changing bidule to patente a gosse will get you further, but the real way to get in touch with this marvelous dialect and accent is the online video series Têtes à claques.
As Google Fight shows, referer is more common on the Internet than referrer, even though referrer is the correct spelling.
Wikipedia describes a possible cause:
Referer is a common misspelling of the word referrer. It is so common, in fact, that it made it into the official specification of HTTP – the communication protocol of the World Wide Web – and has therefore become the standard industry spelling when discussing HTTP referers.