1. showing excessive celebration of victory or success, often in a way that is insensitive to others

1. a person who displays triumphalist attitudes or behavior

Examples

• The coach warned against triumphalist behavior after their victory.
• His triumphalist speech alienated many former supporters.
• The newspaper’s triumphalist headlines seemed inappropriate given the circumstances.
• She criticized the triumphalist tone of the celebration.
• The politician was labeled a triumphalist after his victory speech.
• Their triumphalist attitude made reconciliation difficult.
• The team avoided triumphalist gestures out of respect for their opponents.