1. verb To disclose too much information, typically that which is related to one's personal life and which would makes the recipient uncomfortable or which the recipient would prefer not to know. Please try not to overshare when the boss is around, OK? He doesn't need to know what the itch cream is for. Oh yes, Janet always overshares. Like, who cares that her fourth hamster died—she's just going to go out and get another one anyway!

2. noun Such a disclosure. Please steer clear of overshares when the boss is around, OK? He doesn't need to know what the itch cream is for. Oh yes, you can always count on an overshare from Janet. Like, who cares that her fourth hamster died—she's just going to go out and get another one anyway!