불다

1. blow
For a wind to form and move in a certain direction.

2. sweep; spread; be all the rage; be popular
For a vogue, trend, change, etc., to take place and spread.

3. blow
To use the mouth to blow or create wind.

4. whistle
To put the lips close to each other and make a sound by exhaling between them.

5. breathe out; let out; exhale
To let out a breath hard through the nose.

6. blow; play
To put a wind instrument to the mouth and exhale to make a sound.

7. tell; admit; let out; rat out
(slang) To say what one has been hiding.