sandbag

Noun

• a bag filled with sand; used as a weapon or to build walls or as ballast

Verb

• protect or strengthen with sandbags; stop up
  • The residents sandbagged the beach front
    

• downplay one's ability (towards others) in a game in order to deceive, as in gambling

• hit something or somebody as if with a sandbag

• compel by coercion, threats, or crude means
  • They sandbagged him to make dinner for everyone
    

• treat harshly or unfairly

Related words

• Synonyms: 
  stun , dragoon , railroad