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7.
Blow off is a British slang term usually used by children to mean "fart". This term was prevalent up until recently but its use seems to be declining and the bawdy American version which means to ignore, or snub, is taking over.
This is one of the reasons Americans are laughed at in Britain as it causes some humour in British households.
My older sister was on the phone to her boyfriend last night and I heard her blow off just as she was pretending to kiss him.

Hey these days you dont talk to nobody, you know what they call you down at Morgans Bar? huh? they call you Mr Blow off, yeah ! hey how about that.

by mrgloop April 04, 2008
 
1.
to ignore
She has better thing to do that nite so she will blow off the boring plans.
by abitooc March 03, 2004
 
2.
to cancel plans, dates or events
I blew off my plans to hang out with my girlfriend.
by A. March 20, 2005
 
3.
1.) To tell someone to go away in a rude manner.


2.) To shine on, or to ignore
1.) Blow off Jeffrey, I don't want you here any more.


2.) The party was full of losers so she blew it off.
by Alex January 02, 2005
 
4.
British slang for farting.which is far different from the American meaning: to ignore, avoid, dumping of a girlfriend or boyfriend
that old man over there looks like he is about to blow off.
by shmorkey August 14, 2007
 
5.
To give the cold shoulder to someone considered a nuisance or want nothing to do with.
She's going to blow off John because she's not interested in him.
by dkxs December 07, 2009
 
6.
Something (class, task, job, etc.) that is incredibly easy to accomplish, so it requires no work at all.
Junior year, I plan on taking Art Class, News Analysis, Beginning Jewelry Making.

Man, those are going to be blowoff classes!
by DeSpartacus Manassas April 28, 2011