Bum Puffie 

the release of gas through the anus: a fart

Three year old passes gas, "Mom, did you hear my bum puffie?"

Bum Puffie by Michele Wall June 26, 2006

bum puffing 

To inhale a cigarette/marijuana joint in an incorrect fashion thus preventing the intake of smoke in the smoker's lungs reducing the effect of euphoria recieved from smoking.

Joe: Can I have a cigarette?
Martha: No, You'll just bum puff it and waste it.
(bum puffing)

bum puffing by Of Man April 12, 2008

Puffin Bum

"puffin bum" \ PUFF-in-bum\, noun:
1. The largest species of all known and recorded bums.
2. Big; Ginormous; Humongous.
3. popozuda.

Examples:
"Of my goodness! Did u just see that Puffin Bum?!"
"I know! Its the biggest butt i have EVER seen!".

Puffin Bum by Mrs Mole January 7, 2011