Entry: coffinous (adj.)
In context: "Potentially young forms in down sleeping bags of coffinous shape were now discernible around the black remains of the night's bonfire."
Definition: A neologism, if a fairly obvious one.
Other: coffin (n.) appears to be a very early word: c1380 Eng. Wycliffite Serm. in Sel. Wks. I. 62 Þei gedriden and filden twelve coffynes of relif of fyve barly loves.
Also, since I can't resist, I should point out that I'm typing this up with some sort of chest infection. I'm absolutely coffin up a storm.
SNOOT score: 1
Source: Oxford English Dictionary