To breakwind or fart. (ie. to emit wind from the anus, squeeze cheese, float an air biscuit, a bottom burp, flatulate, etc, etc).
Bloff is a contraction of "Blow off" (which is an English term for farting (not to be confused with the American term "Blow off" which is unrelated).
Sometimes there is not an inoffensive or child-safe word for flatulence in polite company, this is where bloffing comes in. To say someone is bloffing is far more socially acceptable, and even child friendly. It's especially easy to tell your kid to stop bloffing in a crowded restaurant, for example. Equally, it's not a big issue if your child shouts out "I did a bloff" in a supermarket or such!
Who did that bloff in the elavator?
No bloffing at the table Timothy!
Sorry Mum, it was me that bloffed at the buffet!
1. An interjection. Expresses frustration, excitement, or surprise.
2. A noun. Describes objects or processes which take too long or too much technical knowledge to describe - often under circumstances warranting the phrase as an interjection.
Use 1. a) Where the heck did you put my keys? Blaffy blooffy!
b) Blaffy blooffy! You scared me, Elsa!
c) I had no idea you would be here! Blaffy Blooffy!
Use 2. a) I went down to the blaffy blooffy to get my taxes done.
b) Jeremy carefully pried the blaffy blooffy from the barbed wire entanglement and rescued what remained of it.
c) If your blaffy blooffy isn't finished soon, I swear I'll kill you.
d) Come on man. Blaffy blooffy can't be that hard to read; i read 25
pages of it in the bathtub this morning.