Check poker
1) Make no bet, but still hold your cards. You can check, and
then call a later bet, fold when the action gets back to you,
or raise.
Technically, to check is to make a bet of nothing.
2) A card room chip; often plural.
When a player cries out "Checks!", he is signaling
to a floorperson his intention to buy more chips.
The term check is generally limited to card rooms and casinos,
while chip is more heard in home games, though common in both.
Check (general terms)
See Chip. Color Up/Out: Exchange smaller denomination chips
for larger denomination chips.
Check (Money) Down (blackjack)
An expression used by a dealer to inform the floor person that
a chip has fallen
on the floor, a situation, which requires his immediate attention.