A check done by men during foreplay to see if a chick is clean enough to eat out. The guy fingers the chick's pussy and then he gets his fingers back into range of his nose to sniff without the chick noticing. It is easily done behind her back while kissing the side of her neck
When a parent hugs you and discretely sniffs for pot, alcohol, etc.
"Ah man this party's the bomb, you wanna smoke with me?"
"Nah bro, my mom always smell checks me when i get home."
"oh. .. Wanna try exploding Dave's cat in the microwave?"
"Yes."
Smell Check : Odor Eliminator Is a pump style Air Freshener that Blocks or Eliminates unwanted odors, Such as the odor of Marijuana It is most often found in Head Shops and Conveyance stores
Thank God I had my Smell Check or we would have been busted for smoking .