marcassin

marcassin is masculine in French.

young wild boar, marcassin

“Je n’y avais jamais fait le sanglier le groin dans l’herbe avec elle sous mon ventre, mon marcassin, mimant l’attaque des loups.” — Here, I had never pretended to be a wild boar with my snout in the grass, with her under my belly, my boarlet, miming a wolf attack.

Probably from marque, because of their striped coat.