To perform oral sex to another person. Mostly likely to define commiting the act to a man.
Bro, Sofie just blew me off last night, she is an animal in bed.

Tammy is going to blow off Jack tomorrow, he's so lucky so much.
by BoofAsher420 January 17, 2019
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Someone who you know in person that only chats with you on social media but will deliberately ignore you in real life
I thought Joe was a really cool person to chat with online but when I saw him in a bar he ignored me and was a blowoff the whole entire night
by peasenoff smells September 29, 2018
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