blow off

Short definition from Wiktionary

Verb

1. 1
   To remove something by blowing on it.
2. 2
   To vent, usually, to reduce pressure in a container.
3. 3
   To let steam escape through a passage provided for the purpose.
4. 4
   Synonym of fart.
5. 5
   To shirk or disregard (a duty or person).
6. 6
   To shirk or disregard (a duty or person): To abandon (someone) as the last stage of a scam.
7. 7
   To shirk or disregard (a duty or person): To reject or shut down someone's sexual advances or other offers (e.g. a job offer).
8. 8
   To forcibly disconnect something by use of a firearm or explosive device.
9. 9
   To force to leave a course.
10. 10
    To perform oral sex on (someone); to give a blowjob to or suck off (someone).
11. 11
    To buy food or drink for (someone); to treat (someone).
12. 12
    To use up or spend (something).

Noun

1. 1
   Alternative spelling of blowoff.