A frombie is a what Abby and Jonah call the zombie like people under the Snow Queen's spell.
Frombie's are people the Snow Queen has put under her spell. A frombie can only say their favourite things that they long to have or do. Frombies believe that they enjoy playing with the Snow Queen building snowmen and making snowballs.
Becoming A Frombie
When the Snow Queen blows you 'a Kiss' you become glazed over and distant. As Jonah explains it, "...that was so awful! I saw you, but I couldn't talk to you! I couldn't do anything I wanted to do!" "...then I felt a kiss of cold air. And I kept thinking of ketchup and cheetos"