
To the gills
Overflowing Imagery
Visualize a space so filled there's no room left, illustrating an extreme degree of fullness.

My bookshelf is stuffed to the gills; I can't fit another book!
Not Literal
'To the gills' doesn't mean something is literally filled with fish parts; it's just an expression.

His suitcase was packed to the gills, barely closing.
Negative Expression
Often used to describe uncomfortable situations due to excessive fullness.

We left the concert early because it was packed to the gills.
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