look up any word, like basic bitch:
 
1.
a time for wine, often around early evening (5pm-ish). It is similar to "Beer O'Clock" in that it can be anytime a wine appreciator (read: "wino") feels that some good vino might just hit the spot
Man, today was a long day—it's definitely wine o'clock now.
by CadeRageous! April 26, 2007
 
2.
anytime during the day when a wine is most definitely in order.
" Mmmm, I think its wineo'clock!"
by Idgy July 28, 2009