Ya. Me and some friends made this word up back in 1983 or 1984 in Brockton Massachusetts. A spleef is a marijuana joint. We also at the same time made up the word zabe, which was a term referring to a rolling paper. Making up terms and throwing them into the popular lexicon is like throwing shit against the wall, sometimes it sticks, sometimes not. Spleef stuck.
Two other terms we made up during this time referred to a woman's squishy spots. One was cum dumpster and the other was hog garage.
An ambiguousverb that does not really explain what is occurring. Can be used in a good or bad way (see examples). Most commonly used with bodily parts.