doofer
1. A name for a gadget or thing whose actual name is unknown or has been forgotten. Where's that doofer? I need it to finish this repair. Hand me that doofer or whatever it's called, will you?
2. A cigarette stub saved for later use. I knew I was running low on smokes today, so I saved this doofer.
doofer
and dufer (ˈdufɚ) n. a (found or borrowed) cigarette saved for smoking at another time. (It will do for later.) He takes two fags, one to smoke and a dufer.
dufer
verb