you got a dog? if you do just like say your talking him/her for a walk and take a joint an lighter with you and smoke it, and take some deogrant to put on afterwards. or just smoke out of a bong. just stick some towels under the crack of the door at bottom and crack open a window and exhale the smoke towards the window.

this is why i always do this late at night when my parents are alseep...

hope i helped