It’s about time. We are now on Instagram!
word-forming element in compounds such as hen-fest, gabfest, etc., 1889, American English, borrowed from German Fest "festival," abstracted from Volksfest, etc., from Middle High German vëst, from Latin festum (see festivity).
A celebration or extensive exercise and indulgence of what is indicated: slugfest/ gabfest/ fuckfest/ jazzfest/ schmoozefest/ splatterfest
[1880s+; fr German, ''festival'']