An attachment made for the end of a BIC lighter used to pack down a bowl. Originates from the actual name brand ASHMASHMER which is said as ASH-MASHER. shmashmer is pronounced as SHMASH-MER. This was found to be an easier way to say the actual name so ashmasher was replaced by shmasher forever in the vernacular of those that blaze the herb.
Me: Hey this bowl has hella ash on top, pass me your shmashmer so I can get a hit
Frankie: Fa Sho homie I got the ninja, black lighter with the black shmashmer.