Pushka poker
A pushka is an arrangement between two or more players to
share part of the pots they win, or more precisely, the container
into which the shared chips are placed. Typically pushka partners
will place as much as $10 from each pot won into a container,
and split the container's contents later. I've only heard this
term in Maryland, although apparently it's due to the Polish
word for box, via Yiddish. Of course removing chips from the
table is illegal in table stakes games.