mug noun [C] (FACE)
informal mainly disapproving
his ugly mug
a. A face, esp. an unattractive one.
1708 Brit. Apollo 13–18 Feb. My Lawyer has a Desk, nine Law-books without Covers, two with Covers, a Temple-Mug, and the hopes of being a Judge.
1798 G. Colman Heir at Law iii. ii. 47 Never let him clap his damned ugly mug in these here doors again.
1824 P. Egan Boxiana II. 412 His mug was often disfigured with the claret trickling down.
1850 E. FitzGerald Lett. (1889) I. 200 I found A. Tennyson in chambers at Lincoln's Inn: and recreated myself with a sight of his fine old mug.
1895 G. Meredith Amazing Marriage I. xvi. 186 Look at old Rufus Abrane. I see the state of the fight on the old fellow's mug. He hasn't a bet left in him!
1930 J. B. Priestley Angel Pavement ii. 84 They were all tired of seeing his depressing old mug.
1955 A. West Heritage i. 16 This is for you because you've got such a funny little mug.
1986 ‘L. Cody’ Under Contract xvi. 59 What! Miss a chance to get your ugly mug in the papers!