Definitions for "Geyser"
A boiling spring which throws forth at frequent intervals jets of water, mud, etc., driven up by the expansive power of steam.
a natural hot spring that sends up a fountain of water and steam into the air; some geysers "spout" at regular intervals and some are unpredictable.
a hot spring that undergoes periodic catastrophic boiling (erupting).
Keywords:  overflow
to overflow like a geyser