private power generation; in-house electricity generation
Refers to generating one's own electricity, typically via solar panels or a generator, rather than relying on the grid.
This factory covers its electricity needs with in-house power generation.
Jocular slang likening self-pleasure to generating one's own power. Used humorously, often among close friends or online.
"I was doing some private power generation last night," he said jokingly.
自家発電 is a specific type of 発電 (power generation), emphasizing self-sufficiency.
A direct loanword for masturbation, while 自家発電 is a humorous euphemism.
Compound of 自家 (self, one's own) and 発電 (power generation). The slang sense is a metaphorical extension.