the result of a dog that gets snow on it's nose, and is amused for the rest of the day.
A: Your dog has been running around in circles for a few hours...

B: Yeah, he's been sniffin' snow in the backyard.
by æon December 3, 2007
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When you fart then sniff the air around you to see if it smells bad or not.
E~Ay nigga, You look like you be over there fartin n sniffin.

A~Yeah nigga, Taco farts, i gotta sniff.
by APHROdSheeiaakkkk July 31, 2010
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An adventure you go on with your friend Dan. But first you must persuade him in a clean kid voice before doing so. You also have to beckon him to get the best results.
I want to go on a butthole sniffin adventure with my friend Dan COME ON. What are you standing around for knucklehead. Why aren't you following me, I've beckoned you, COME ON.
by Tia Anonymous August 26, 2016
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Has any of 3 meanings:

1. When someone is observing another's actions. Usually when they are doing something that requires attention.

2. Can alternatively mean 'I understand you'

3. Can also be used sarcasticly when invading someones personal space.
example 1:
person1: bro what u doing?
person2: im sniffin u cuz

example 2:

person 1: bro u know how we got together with the boys and went out
person2: yer bro im sniffin u cuz

example 3:

person1: ay wtf u doing so close to me?
person 2:im sniffin u cuz
by Markwick October 5, 2009
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You still experience or see something on the surface, not going deeper yet
A: How was your new school? Feel nice there?
B: Dunno yet. Still sniffin covers
by silverst0ne December 2, 2014
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