Definitions

1. verb

to remove something that is tucked in, especially a shirt or pants, from being tucked in

“He had to untuck his shirt before eating dinner.”

2. verb

to make something untidy or disarranged

“The strong wind untucked the pages of the book.”

3. noun

an instance of removing something that is tucked in

“The untucking of the blanket was a messy affair.”