Wonder Bread is an American brand of very soft, very white sliced bread, sold in a plastic bag with colourful dots on it. It is the plain, cheap bread that many American children grew up eating in sandwiches. Because everybody knows it, the name has come to stand for the whole idea of that kind of bread — bread with no strong taste, no hard crust, nothing interesting in it. From there people use it as an insult for anything boring, plain, and safe. 'His music is Wonder Bread' means it has no flavour, nothing that surprises you. It is also used, sometimes as a joke and sometimes with an edge, to mean 'very white' in the sense of white American culture — bland, suburban, not adventurous. So the word carries a small look-down-on feeling when it is used about people or art. If you are just talking about bread in a shop, it is neutral; if you are talking about a person, it is a mild put-down. Note that the real brand is written as two words, 'Wonder Bread'; 'Wonderbread' as one word is the loose everyday spelling, and that spelling is a sign that the writer means the insult more than the product.

美國一種超軟白吐司的品牌（類似台灣的白吐司、山型麵包）；引申指「平淡無味、無聊安全」的東西