Dutch oven

Farting under the blanket then lifting it up trapping your significant other under the covers

Lying on your back in bed on a cold winter morning, fill the covers with your own hot gasses. Arrange the sheets in such a way as to create a flue or exhaust channel towards your significant other. Simultaneously lift both arms straight up slowly to draw in more air. Finally, let the covers fall rapidly to expel a rush of hot gasses (and BO) up the flue toward your unsuspecting loved one.

Historically, "Dutch Ovens" were preheated brick cooking ovens in which the heated bricks constructing the walls would do the cooking. This modern adaptation approximates the warm rush of heat and aromas that blast you in the face when opening an oven door.
Don't forget to declare "dutch oven" and remember; practice makes perfect.

one who passes gas under the cover, and forces his or her spouse,or companion to smell their creation by throwing the cover over ones head..

Farting under the blanket then lifting it up trapping your significant other under the covers

The act of trapping a person under bed covers after releasing vile ass fumes

To trap the person you sleep with under the covers and fart.

While you are getting a blow job from a girl, throw a blanket over your body(including her head), and fart. This causes her to be "hot boxed" in the stench of your fart