gigglemug

noun3

1. •
   (slang, old-fashioned) A smiling face

   • The students walked down the hallway, their gigglemugs showing their excitement.
2. •
   A perpetually smiling and optimistic person

   • He was quite a gigglemug and brightened the dull Monday.
3. •
   A person who deceitfully behaves in a happy manner

   • Her boss is just a big gigglemug, and she's the only one who knows what he's really like.