"tossed up by this ... town" means that these boys are a product of the town; they were born and/or raised there. It also has connotations of either casualness (perhaps suggesting that their lives are not very significant or remarkable) and/or suddenness (perhaps suggesting a new town or a town that has recently grown in size).
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Mr Wordyconjures up an image of a working-class town.I've never heard the term but I would agree with your speculation.
Angliholichow do you get the working-class town from "brick and hoagie?"