1 definition by BlazerMan

Top Definition
A glass downstem with drilled or laser-cut holes at the bottom in order to increase bubbling to further cool the smoke. Used in a bong.
John: I got an ash-catch for my bong, and a new downstem.
Bill: Is it a diffused downstem?
John: Of course, you think I'm crazed?
by BlazerMan November 09, 2007
Mug icon
Buy a Diffused Downstem mug!