exclam. “How exciting!”; “How stimulating!”; “Wow!” (Originally said on seeing an extremely good-looking or sexually attractive girl.)
Did you see her? Schwing!Nice car. Schwing!
schwing!
used as a vocalisation of the sound a penis makes getting suddenly erect at the passing of a beautiful woman. A gift to teen slang from Mike Myers and his 'Wayne's World' sketches US, 1992