dim sim noun1 •(Australia, New-Zealand) Any of various kinds of Chinese-style meat and cabbage dumplings, similar to shumai and other dim sum and usually steamed or deep fried. Commonly offered by Chinese restaurants and fish-and-chip shops.For the defence, James Harris, of Northcote, said he had put a bottle of beer in his hip pocket at home, and went to the cafe to buy some dim-sims. — 1925 formsdim sims