soul patchn. chiefly North American a small (cultivated) tuft of facial hair directly below the lower lip, worn alone or in addition to a moustache or beard.
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1986 Houston Chron. 5 Apr. iv. 1/1 He's a throwback to some early species of hipster. ‘Yeah, man,’..[he] is fond of saying, with his nifty little soul-patch and goatee and slicked-back hair.
2004 Niagara Falls Rev. (Ont.) (Nexis) 19 July a5 Irwin forced him to shave his soul patch.