1. shares more information about oneself or one's personal affairs than is appropriate or expected in a social or professional context
Usage: informal; third-person singular present tense of 'overshare'

Examples

• She overshares personal details on social media that she later regrets.
• He overshares about his medical history during casual conversations with coworkers.
• The candidate overshares about family problems during the job interview.
• My friend overshares every detail of her dating life, even when I don't ask.
• He tends to overshare when he's nervous, talking too much about himself.
• She overshares on first dates, which makes potential partners uncomfortable.