lifting a girl's skirt; flipping up a skirt
Refers to the act of lifting or flipping up a girl's skirt, often as a prank or mischievous act. The term is a compound of スカート (skirt) and めくり (turning up).
When I was in elementary school, boys often flipped up girls' skirts.
Flipping up a skirt is now considered sexual harassment.
Compound of スカート (skirt) and めくり (noun form of めくる, 'to turn up'). The exact origin is uncertain, but it likely emerged as a colloquial term for the prank of lifting a girl's skirt.