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1. sniff
cocaine
slang for cocaine
2. sniff
An expression used in the modern era of text messaging to signify a melodramatic sad feeling as succintly as possible.
(Upon the text message recipient not having called or texted recently) Where are you? Sniff :o(
3. Sniff
1) A term used to describe a woman who flirts with guys or lesbian females at a bar only to use them for free drinks before leaving abruptly. Usually dressed like a slutty brunette or a busty blonde with a cute smile and a southern twang.

2) (in past tense) A male or lesbian female who just got used for free drinks by an attractive and flirtatious lady.
Damn, I just got snuffed by that Sniff after buying four rounds of Heinekens and Jager Bombs
4. sniff
to do a line of drugs through your nose
I just sniffed a line of coke.
by caitlin Feb 26, 2005 add a video
5. sniff
a name for petrol commonly used by aboriginals
HEY BRAH WANNA GO DOWN TO DA BP AN GET SOME SNIFF AYE???
6. sniff
To examine packets going to and from computers in a network, usually with the intent of gathering information that is otherwise secret, such as passwords, or instant message conversations.
"Dude, I was wardriving and I totally sniffed this guys suicide girls password."

"Bitchin'"
by evilocity Aug 6, 2005 add a video
7. sniff
1.) to take a quick breath through the nose.

2.) to take a quick sample.
Hey, bro can I get a sniff of my money?
by Joe M. Jul 31, 2004 add a video
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