yeah it means both, can be the rolled up cardboard filter or just the end of the j, i used to roll w/o em, but you get a much better shape to the j if you use em, and i'd always forget what i did w/ my old roaches when i used to save em, this way you can just smoke the whole thing...has anybody ever hit when the filter was burning tho, trying to get the last bits of weed, its pretty nasty, harsh as hell lol