The Halbstarke (German for "half-strong") was a youth subculture that emerged in West Germany and German-speaking countries during the mid-1950s. It was a highly publicized, largely non-political movement representing the first widespread youth revolt in post-WWII Germany. The aesthetic was a direct copy of American "delinquent youth" culture, specifically the Greaser style, which was adopted as a physical and visual protest against the pervasive conservative morality, strict societal rules, and perceived hypocrisy ( Spießigkeit ) of the older generation.

The term itself was often used by the media and authorities as a derogatory label for working-class male youth associated with rowdyism, consumption of alcohol, and deliberate provocation of authorities through their appearance.

The movement represented a deliberate split from the prevailing German culture, which favored Heimatfilme (homeland films) and Schlager music. Halbstarke youth instead consumed American Rock 'n' Roll, which was often denigrated by the establishment as "jungle music" ( Urwaldmusik ) or by racial slurs.

The Halbstarke aesthetic was defined by a rejection of the neat, traditional German youth styles, instead embracing the aggressive, imported glamour of American pop culture idols.

The fashion was a pastiche of figures like James Dean, Marlon Brando, and Elvis Presley:

The Halbstarke movement was unique for the intense public and political reaction it provoked in the newly established Federal Republic of Germany.

A key feature of the movement was the eruption of " Großkrawalle " (major riots) that frequently followed screenings of American films or rock 'n' roll concerts between 1956 and 1958. These riots, which sometimes involved up to 4,000 youth, featured wilful destruction of property (such as cinema furniture) and confrontations with police. The riots were often seen as pointless and chaotic, reflecting a desperate desire to vent dissatisfaction with the bleak and strict society.

The subculture's look and attitude were codified by specific films and actors:

While the movement as a whole was not politically organized, it is largely understood today as a legitimate, visible form of protest against the nation's conservative authorities and the adult generation's focus on forgetting the war and achieving economic stability (" Keine Experimente ").