I. ˈsan(d)-ˌbag noun
Date: 1590
: a bag filled with sand and used in fortifications, as ballast, or as a weapon
II. verb
Date: 1860
transitive verb
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