blow off

verb12

1. •
   To forcibly disconnect something by use of a firearm or explosive device.

   • Her leg was blown off by a landmine.
2. •
   To shirk or disregard (a duty or person).

   • I decided to blow off the meeting and leave early.
   • We've both been blowing off Peter all day: he's really boring.
3. •
   To abandon (someone) as the last stage of a scam.
4. •
   (informal) To reject or shut down someone's sexual advances or other offers (e.g. a job offer).
5. •
   To cause (a body part etc.) to detach by shooting it with a firearm.

   • The gangster blew off the sheriff's head.
6. •
   To vent, usually, to reduce pressure in a container.

   • The radioactivity was released when they blew off steam from the containment vessel.
7. •
   To let steam escape through a passage provided for the purpose.

   • The engine or steamer is blowing off.
   • What's the best way to blow off and clean a boiler?
8. •
   To force to leave a course.

   • The storm blew the ship off course.
9. •
   (slang) To use up or spend (something).

   • He blew off his inheritance on partying.
10. •
    (UK, slang) Synonym of fart.

    • I can't believe I blew off in church.
11. •
    (slang, vulgar) To perform oral sex on (someone); to give a blowjob to or suck off (someone).
12. •
    (slang, old-fashioned) To buy food or drink for (someone); to treat (someone).

    • I'll blow you off to dinner.