the.com/leg sweep

means A takedown move where you knock your opponent's leg out from under them to put them on the ground.

from Straightforward compound of 'leg' and 'sweep' — sweep in its old sense of a broad, clearing stroke, like sweeping a floor with a broom. Martial arts term, formalized in judo and other grappling disciplines as a named technique (osoto gari and its cousins are Japanese leg sweeps specifically), but the plain-English name just describes exactly what the body does: the leg arcs through like a broom through dust, and your stance goes with it.