Private parts (either gender) with a particularly bad odour.
Don't go down on him, he has a smelly nelly!
by meowlnir June 30, 2016
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When you eat out someones asshole, and they fart in your face.
Last night when me and Samatha did it, she wanted me to give her a Smelly Nelly, it was so hot!
by Jakeypooandblackkid October 18, 2011
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A frozen piece of poop in the shape of a penis used for his/her pleasure
Turns out the guys were using frozen pieces of poop to pleasure themselves, called then smellie Nellie's
by cstott519 November 4, 2018
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A girl who will most likely be a homosexual. She has lots of friends, this is because she is mad spicy and loves older women, preferably teachers. She has impeccable eyebrows. She may not play sports but that is okay she puts work in at the gym to have bigger biceps than most football players. She loves her friends very deeply and would murder someone for them. With her iconic low pony look she struts through the hallways and daps everyone up like the God she is.
lauren: who is that girl over their strutting in the low pony?
iva: oh, you don't know that is SMELLY NELLY with her big muscles.
by meowkitty6920 April 15, 2020
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