I used to know some Socialist Workers. And one of them used to refer to people as 'lumpen'. One day I asked her if that was what Socialist Workers said when they meant 'common', and she went red and said 'yes' in a very small voice.

ROFL...

To quote Karl Marx on who constitutes lumpenproletariat:

Alongside decayed roués with dubious means of subsistence and of dubious origin, alongside ruined and adventurous offshoots of the bourgeoisie, were vagabonds, discharged soldiers, discharged jailbirds, escaped galley slaves, swindlers, mountebanks, lazzaroni, pickpockets, tricksters, gamblers, maquereaux [pimps], brothel keepers, porters, literati, organ grinders, ragpickers, knife grinders, tinkers, beggars—in short, the whole indefinite, disintegrated mass, thrown hither and thither, which the French call la bohème.