Derived from the word driveby or drive-by, a sniff-by or sniffby is the act of checking the levels of freshness/cleanlyness from someone's smell. Example a parent might pick up their baby and do a sniff-by (especially if wearing a onesie or overalls; no easy view at the diaper's fullness). Parent might do a sniff-by on their teenager's armpit, if a shower was needed or how long of a shower was needed. One might do a sniff-by on someone undies (not for fetishes, but to see if they were having an affair). The smell of latex from a condom, semen drippings, or aftershave from recent grooming.
The stalker's sniff-by went unnoticed in the crowded elevator.
When you're thirteen,on the school bus,sitting with your " girl " trying to get a few scratches between them thighs,so you have something to sniff while waiting for everyone in the house to fall asleep so you can polish your carrot.
Bobby was excited to sit next to Jill on the bus today; if he's lucky he'll be able to have a Scratch&Sniff session this evening.
You scratch someone’s asshole and make forcefully sniff your hand.
Yesterday I gave Seb an alaskan scratch and sniff it was hot
One who blows out through their nose in a rapid & violent reverse-sniff. A sniff lord typically makes this sound throughout the day, along with other gross bodily sounds, such as throat-clear/groan hybrids and knuckle cracking.
The sniff lord has been out-sniffing all day. It's driving me crazy.
To almost fall on one's face, i.e. to trip.
I will probably sniff shit scaling the fence.
An insult for someone who is acting stupid or weird, or a name for someone that has wickedly smelling farts or poop
Yo dude, ryan just left a massive turd in the toilet, he’s such a poop sniff
Sticking any thing up your nose.
Get the mirror, time for sniff difflers