wet dream

noun

An erotic dream (imaginary vision while sleeping) bringing the sleeper to orgasm.
“His mother is having an affair with the man next door, is reading Germain Greer's The Female Eunuch—which spawns Adrian's first wet dream.”
The orgasm in such a dream.
An exciting fantasy; a very appealing, ideal thing, person, or state of affairs.
“Bruce Springsteen may become middle America's wet dream.”
“The plan is, if all goes well, to have these batteries, an eco warrior's wet dream due to their non-toxicity, on sale in two or three years.”

To produce fluids from the sex organs as a result of sexual arousal during sleep; to have an erotic dream; (figurative) to fantasize (about something, especially in a sexual way).
“He is a boy sleeping against the mosque wall, ejaculates wet dreaming into a thousand cunts pink and smooth as sea shells, […]”
“[…] he’d been wet dreaming for several months about such an opportunity as was obviously creeping up on both of them,”
To have an erotic dream about (someone or something); (figurative) to fantasize about (someone or something) sexually.
“[…] the Bakst drawings imposed themselves on the shadowy sultans, sultanas, eunuchs, and pages […] the pageboy of the Fairy Cherry in panniered skirt and cherry-tree headdress―the very same he had dreamed, wet dreamed no doubt as well, pressed down, hemmed in by his wooden box.”
“[…] she left so few traces of having ever existed at all that he began to wonder whether he hadn’t just wet-dreamt her into being.”