n.
Function: transitive verb
Date: 1860
1 : to bank, stop up, or weight with sandbags
2 a : to hit or stun with or as if with a sandbag b : to treat unfairly or harshly c : to coerce by crude means <are raiding the Treasury and sandbagging the government ― C. W. Ferguson> d : to conceal or misrepresent one's true position, potential, or intent especially in order to take advantage of
intransitive verb : to hide the truth about oneself so as to gain an advantage over another
– sand · bag · ger noun