Exults in a smug way

• Crows, maybe
• Rubs it in
• What a bad winner does
• Is a bad winner
• Is a braggart
• Exults maliciously
• What a poor winner does
• Is smugly happy
• Shows evil satisfaction

Wiktionary Word definitions in Wiktionary
n. (plural of gloat English) vb. (en-third-person singular of: gloat)