means A daring physical feat performed for effect, often risky and carefully staged, especially in film or sport.

from American slang that surfaced in the late 19th century, originally in college athletic circles for a feat or trick of skill. Its deeper roots are murky — possibly a blend or variant of 'stump' (a challenge or dare) and 'stint' (a set task or feat), though no one can prove the marriage. The 'risky cinematic feat' sense came later, riding in with the movie age and its hired daredevils.