tuck in

tuck in idiom
Thrust in the edge of or end of something, such as bed linens or a shirt; also, make a child secure in bed by folding in the bedclothes. For example, Tuck in your shirt; it looks awful hanging out of your pants, or Mother went upstairs to tuck in the children. [First half of 1600s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.