Gigglemug

The students walked down the hallway, their gigglemugs showing their excitement.

Source: wiktionary

Mrs. Smyth scowls at me. "Why do you wear such a gigglemug? What is so amusing? We will surely be delayed. My husband has a vital appointment he cannot miss."

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He was quite a gigglemug and brightened the dull Monday.

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'You were quite the gigglemug back then, Hugo,' said Walter approvingly. 'Even after your father died, you and Flo always managed to make a joy of Christmas. In fact, it was your favourite time of the year.'

Source: wiktionary