To be not only sitting on your bed, but to actually be horizontal and under the covers, prepared for sleep.
by G. Thomas August 09, 2006
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This phrase is declared when an electrical socket is needed for personal usage (i.e. a phone charger), but a limited number of sockets are available for the number of people present (i.e. a family). Thus, the socket is "reserved". Stems from the phrase, shotgun, which is declared to reserve the front passenger seat of a car.
by G. Thomas June 24, 2008