Sandbag

Definitions

1. A sturdy sack filled with sand, generally used in large numbers to make defensive walls against flooding, bullets, or shrapnel.
2. A small bag filled with sand and used as a cudgel.
3. An engraver's leather cushion, etc.
4. A deceptive play whereby a player with a strong hand bets weakly or passively.

Equivalents

CEFR level