ruihihihi
"ruihihihi" is categorised as a goofy ahh sound effect. It is commonly used/appeared when the arrival of Quandale Dingle, or something that can be categorised as a "goofy ahh event or quote" occurred. Nevertheless, it could also mean lol, lmao, or something funny, goofy ahh.
Quandale Dingle: hello guys, Quandale Dingle here
Background: ruihihihi
Background: ruihihihi