My advise to you is go outside and smoke. If your parents don't want you smoking the magical ganja, don't disrespect their home by smoking in their house.



...but if you insist, nobody should deny you the holy Ganja = D

Put a towel or blanket along the crack in the door.
Get some Frebreeze Air Effects, Mint. Works like a charm.
Some really smelly candles.
A fan, then open the window, blow your smoke towards the window while the fan blows as well.
TURN OFF THE CIELING FAN.
Then lastly, if your fingers reek so bad of bud, either go wash your hands or dip your fingertips into something harsh-smelling (a liquid. You could use listerine, orange juice, vodka. meh.)