This is a pictograph of a man doing a little jig of celebration whilst wielding two bows and arrows. Hence, it is an ideograph for the adjective triumphant.
Illustrative Text Reference:
Chanhujo-daro: Seal: C-23 a: Jagat Pati Joshi and Asko Parpola, 1987: Corpus of Indus Seals and Inscriptions: Volume 1: Page 333: Collections in India: Suomalainen Tiedeakatemia.
Comment:
This is Mahadevan's sign number 6402, which I have redrawn to better reflect the original.
Image Credit:
Triumphant: Lynn Fawcett, 2018.