Definitions from Wiktionary ( )

▸ noun:  A sturdy sack filled with sand, generally used in large numbers to make defensive walls against flooding, bullets, or shrapnel.
▸ noun:  A small bag filled with sand and used as a cudgel.
▸ noun:  An engraver's leather cushion, etc.
▸ noun:  (poker) A deceptive play whereby a player with a strong hand bets weakly or passively.
▸ verb:  (transitive, intransitive) To construct a barrier of sandbags (around).
▸ verb:  (transitive) To strike someone with a sandbag or other object to disable or render unconscious.
▸ verb:  (figurative, intransitive, originally US) To conceal or misrepresent one's true position, potential, or intent in order to gain an advantage; (originally poker) to pretend to have a weak hand, as a strategy.
▸ verb:  (figurative, transitive) To blindside; to deceive; to undermine.
▸ verb:  To pretend to drink early on so that, as the night draws on, one can drink everybody else "under the table".

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