Having intense, repeated sex under the influence of a haunted room.
Buffy and Riley, under the influence of the poltergeist, were stuck having sex repeatedely without realization of what was happening outside the room like one big poltergasm.
by Tweakbunny July 25, 2009
1 more definition
When, during oral sex performed on a female, the female arches her back off of the bed and seemingly levitates due to the intensity of her orgasm.
He's so talented at oral sex he gives me poltergasms.
by Lttlmstrbl May 05, 2012