To go to bed after drinking most of the evening. The pouring action is used rather than a climbing or crawling action, as the person falls into the bed in a fluid manner similar to a header
or a swan dive
. This is often done with street clothes on, as most people pass out
upon entering one's bedroom. It is also said that drunk people lack the coordination to change clothes.
Pouring into bed is typically followed by a hangover
the next morning.