Song lyrics by Joe Dassin and George Brassens

[Alice Marvell]

Hi...i often have questions about songs I'm listening to...often French slang.  Is this the best place for these questions or can someone recommend a good place to ask?  Here's one, anyway:  In the song La Bande  a Bonnot (lyrics here http://www.lyricsmania.com/la_bande_a_bonnot_lyrics_joe_dassin.html)...what are the hirondelles referred to?  Presumably not swallows?

And can anyone recommend a good french-english slang dictionary...ideally online?  Many thanks. Alice.

[Neil Coffey]

Yes, basically. Note that the French word argot is also sometimes used in English in the restricted sense of "language used by a particular group for the purpose of solidarity/secrecy".