a bag filled with sand, used in fortification, as ballast, etc.
such a bag used as a weapon.
to furnish with sandbags.
to hit or stun with a sandbag.
Informal. to set upon violently; attack from or as if from ambush. to coerce or intimidate, as by threats: The election committee was sandbagged into nominating the officers for a second term. to thwart or cause to fail or be rejected, especially surreptitiously or without warning: He sandbagged our proposal with his snide remarks to the boss.