trippant
Represented as walking or trotting, usually with one of the forehooves lifted while the remaining three are on the ground.
[Borne by the late 1737.] Richard Davies, Esq. of Kent, 1833.] Davison, gu. a stag, trippant, or.
Where it comes from
From trip + -ant, alteration of tripping, present participle of trip. Compare Scots trippand (“tripping”), present participle of trip (“to skip, go nimbly, trip”).
Adapted from the Wiktionary entry trippant (CC BY-SA 4.0).