chipper
adj.adj. feeling very happy and full of energy. You use this to describe someone who is in a great mood, especially after a good game or a win.
adj. characterised by a high level of enthusiasm, energy, or optimism. Informal in register; typically used to describe a person's emotional state or a team's performance.
The team was chipper after winning the championship.
Even though the game was tough, the players stayed chipper and celebrated their small victories.
The manager's chipper attitude helped lift the morale of the entire staff, making the difficult transition to the new software much more manageable.
From English dialectal kipper (“nimble; frisky”), of obscure origin. Perhaps akin to Old Norse kjapt (“briskly; impetuously”), kippa ("to snatch; pull; jerk" > Middle English kippen (“to seize”)), kipra (“to wrinkle; draw tightly”), Norwegian kjapp (“fast; brisk”), Dutch kippen (“to seize; catch; grip”). More at kip.
From chip + -er.
Compare cheep, chirp.