Sandbagger - Referring to a player making an irregular bid.
In other card games, like blackjack and poker, sandbagging refers to playing a strong hand passively (slow-playing).
A player holding
significant values that initially passes, allowing the opposition to
dominate the auction. Later before the final pass, the sandbagger
either throws in a bid hoping opponents will make a poor double, or the
sandbagger will make a double knowing the opponents have overbid based
on the honors, tenaces, or poor trump suit distribution.
A derogatory colloquial
term perceiving a player deliberately (and unlawfully) changed their
tempo during bidding or play (usually a hesitation). The belief is
that the sandbagger made an attempt to seduce the opposition into
believing the sandbagger holds cards based on their timing. The
Sandbagger's motivation may be to make a subsequent penalty double, or
to make a belated make an achievable bid that opponents would
unknowingly double. Another unlawful sandbag is to hesitate or
make other noticeable gestures to provide the appearance the sandbagger
holds finessable cards under dummy. See