Telegraph (poker)
1) A wire or string used by thieves to signal each other.
For example, one thief may see the holdings of the player next
to him, and signal his partner across the table, who is in the
hand, by pulling on a wire underneath the table that runs from
him to his partner, using some sort of prearranged code.
2) Cheat by sending prearranged signals, say by finger positions
similar to the "signing" used by the hearing impaired,
or by certain code words and phrases embedded within seemingly
ordinary conversation. Sometimes called working the telegraph.
3) Give away one's holdings, by an obvious tell, such as, for
example, a betting pattern or the inability to keep from grinning
when holding good cards
