a bag filled with sand, typically used for defensive purposes or as ballast in a boat
barricade using sandbags
we had to sandbag the doors
they've already started sandbagging the coast road
hit or knock over with or as if with a blow from a sandbag
he is a complex character who too often finds himself sandbagged by his own self-destructive tendencies
deliberately underperform in a race or competition to gain an unfair advantage