slang
Tank
Also: tanking, in the tank, clock, call the clock
Taking a long time over a decision ('going into the tank'). When it goes on too long, any player can 'call the clock' and the floor gives the tanker a fixed time — usually 30 seconds plus a countdown — to act or have the hand folded.
Example. He tanked for three minutes before the clock was called and folded with two seconds left.
Excessive tanking became such an issue in tournaments that many series adopted shot clocks (typically 30 seconds per decision with a few time-bank extensions) at high-roller and final-table stages. Online sites have always had a time bank.