The vague nostalgic sadness that people over 35 (+/-) feel in early December each year around the anniversay of John Lennon's assasination.
"Hey....what's up with you lately?....you're lookin' a little down"

Oh....It's nothing....I just heard that today is the 30th anniversary of John Lennon's assasination. I cant believe it's been THIRTY years and I'm just felling a little Lennoncholy"
by beadmaven December 8, 2010
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