Sans-culotte

[Justin Bieber]

A fellow without breeches; a ragged fellow; -- a name
of reproach given in the first French revolution to the extreme
republican party, who rejected breeches as an emblem peculiar to the
upper classes or aristocracy, and adopted pantaloons.

[Donald Trump]

Liberal, radical, extreme [revolutionary] or [affiliated] with counter culture. From [the French Revolution]’s extreme revolutionary political movement: Sans-culottes.