blow someone/something off

blow off

1. verb Literally, of air, to move something off of a surface. In this usage, a noun or pronoun can be used between "blow" and "off." That wind today blew off all of the clothes I'd hung on the clothesline. Thank you so much for blowing the snow off of my car!
2. verb, slang To ignore or intentionally avoid a person, planned event, or responsibility, often to do something frivolous instead. In this usage, a noun or pronoun can be used between "blow" and "off." I blew off class this afternoon and went to the mall instead. Tom and I were supposed to go on a date tonight, but he totally blew me off!
3. verb To engage in frivolous or unproductive activities. Stop blowing off and just work on your paper!
4. verb To explode off of something, typically due to an increase in pressure that must be released. If you keep shaking that bottle of soda, the cap is going to blow off!
5. verb To voice one's anger or frustration. I'm sorry to rant like that, but work is so frustrating right now that I needed to blow off a little.
6. verb To deceive or swindle someone or something. In this usage, a noun or pronoun can be used between "blow" and " off." Ever since Todd found out I have money, I get the feeling that he's trying to blow me off.
7. verb, vulgar slang To perform oral sex on a male.
8. noun An argument. In this usage, the phrase is often hyphenated. Have you two reconciled after your blow-off last week?
9. noun The act of ignoring someone. I thought our date went well, but he seems to be giving me the blow off now—he hasn't called in days.
10. noun The last in a series of recurring offenses or problems that causes one to finally lose patience. In this usage, the phrase is often hyphenated. My mom's catty comments usually annoy me, but when she insulted my husband, that was the blow off!
11. noun Something that is very easy to do. In this usage, the phrase is often hyphenated. Come on, these chores are a blow-off—you can get them done in 10 minutes.
12. noun One who prioritizes frivolous activities over important or productive ones. In this usage, the phrase is often hyphenated. Stop being such a blow-off and just work on your paper!
See also: blow, off
Farlex Dictionary of Idioms.

blow someone/something off

1. tv. to neglect or ignore someone or something. Get it done now. Don’t blow it off!
2. tv. to cheat someone or a group; to deceive someone or a group. Don’t try to blow me off! I know what’s what.
See also: blow, off, someone, something
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • blow off
  • base off (of) (something else)
  • check off
  • blow off the map
  • bite off
  • cast off
  • brass off
  • brass someone off
  • brassed off
  • call off