noun
soba with broth poured over it
A dish of chilled or hot soba noodles served with a concentrated broth poured directly over them, often with toppings like grated daikon, green onions, or tempura flakes. Compare with かけそば, where the noodles are served in a bowl of hot broth.
See also: かけそば
夏は冷たいぶっかけ蕎麦がさっぱりしていて美味しい。
In summer, cold bukkake soba is refreshing and delicious.
ぶっかけ蕎麦に天かすとネギをたっぷりのせた。
I put lots of tempura bits and green onions on my bukkake soba.
かけそば is soba served in a bowl of hot broth, while ぶっかけ蕎麦 has the broth poured over the noodles, often with a thicker, more concentrated sauce.
From ぶっ掛ける (to pour over, splash) + 蕎麦 (soba). The name describes the preparation method of pouring broth over the noodles.