What is Sphagnum?
1.
moss that is found in wet, spongy ground.
person a: So what do you do for fun?
person b: I enjoy watching sphagnum grow.
See
2.
really crap under rehearsed band, who play friends of friends parties at bowling clubs etc...instead of applause they receive calls of "jukebox"
"gee this band sux, what a bunch of sphagnums! JUKEBOX!"
See