godan verb (-ru), intransitive verb
act chic; put on airs; try to look cool
Describes someone who tries to appear stylish, sophisticated, or cool, often with a nuance of pretentiousness. Similar to 粋がる (いきがる), but 粋ぶる emphasizes the affected behavior more strongly.
See also: 粋がる
彼はいつも粋ぶって、難しい話ばかりする。
He always puts on airs and only talks about complicated things.
あの人は粋ぶっているけど、実はあまり詳しくない。
That person acts like they know everything, but actually they don't know much.