yellow-belliedEnglishOxford Dictionary of Englishyellow-bellied /ˈjɛlə(ʊ)ˌbɛlid / ▸ adjective 1 (of an animal) having yellow underparts: yellow-bellied marmots. 2 informal, derogatory (of a person) cowardly: I inquired if he considered himself a yellow-bellied hypocrite.