When you're having sex with a girl and you're about to nut and you scream "HYDRO PUMP" before you give her a creampie.
Guy 1 - "Yo I would totally give that girl a Blastoise"
Girl 1 - "Go get her then pussy, you won't"
Guy 1 - "Fuck you I'm gonna do it now!" *Leaves*
Girl 2 - "He's such a fuckboi lol"
the opposite of charazarding throwing water on a person during tea time
he was blastoiseing all day