Rejoices, in an in-your-face manner

• Is smugly happy
• Acts smug
• Rejoices tactlessly
• Crows, maybe
• Says "I told you so!"
• Wins in an ugly way?
• Dances in the end zone, maybe
• Says 'I told you so!'

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