white bread
US /ˈwaɪt breɪd/
UK /ˈwaɪt breɪd/

1.
bread made from wheat flour from which the bran and germ have been removed
:
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She prefers toast made with white bread for breakfast.
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Many people consider white bread less healthy than whole wheat.
2.
a person or thing lacking in character, imagination, or excitement; bland or uninteresting
:
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His music is a bit white bread for my taste.
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The new movie was so white bread, I fell asleep.