wet dream

English Thesaurus

1. an erotic dream (usually at night) accompanied by the (nocturnal) emission of semen (noun.cognition)

hypernym	:	dream, dreaming,
definition	:	a series of mental images and emotions occurring during sleep (noun.cognition)

part holonym	:	nocturnal emission,
definition	:	ejaculation during sleep (usually during a dream) (noun.process)