A line usually associated with a
female orange inkling on Splatoon. This character from Splatoon (probably) got named by the fandom "Woomy" as a "cute little nickname" for her, because of the characters not being named correctly and just called their own species. Just like toads being called toads (Mario), and because it's the sound an inkling
girl makes when tapping the "Booyah!" button.
Inkling
Girl: Woomy!
Octolings: SHE GOT HIM, BOYS! SHOOT!
Inkling
Girl: Oh for crying out loud.
(This may be inaccurate since i don't play Splatoon and i used a few sources from the
internet)