You fart near someone you're about to take a selfie with, and take the picture just as they indulge in your delicious aroma.
You should have seen the look on her face when I took that smellfie. Priceless!
by RickJames5885 March 4, 2015
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To fart and then waft it towards your own face.
Russ: Dude, why are you smiling like that?

Buzz: Because I just did a really impressive smellfie, I'd share it with you, but then it wouldn't be a smellfie.
by Efty November 29, 2013
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To discretely sniff ones underarms for stank before venturing out in to public areas as to not offend other with fowl body odor.
Hey man you ready to go?

Yea but first, let me take a smellfie. *sniff*

Yea we good, let's dip!
by DrTeabagPHD July 2, 2014
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Pictures taken of oneself while pooping, or peeing (girl), usually showing only the legs with pants down or face with just upper body . Often uploaded to social media such as Facebook, Twitter, Instagram, and/or sent to friends via Whatsapp, Snapchat, iMessage, Wechat, BBM, etc.
Girl: "Here let me send you some pictures."

Boy: "Omg did you just send me a bunch of smellfies?"

Girl: "Ugh how did you know I'm pooping..."

Boy: "Cause I see the toilet you dumb kunt."
by Bking604 July 17, 2015
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The act of smelling ones own arm pits to check for body odor.
Dude it's hot as hell in this club I'm gonna run to the bathroom and do a smellfie.
by Original Prankster March 31, 2016
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When you're not sure if you have B.O. so you do a quick sniff, lifting one arm then the other to check your pits.
I wasn't sure if someone was cooking with onions so I took a smellfie to make sure it wasn't me.
by Extremejutsu January 20, 2023
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When you take a selfie of your asshole.
Girls on r/gonewild love to post smellfies
by Tbaggrz March 26, 2014
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