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1.
an emoticon used in chat to show that someone is sighing
Person 1: urg...realtionships are so confusing -.-'
Person 2: I swear.. most guys should run into a wall

by sweetpinkbutterfly November 12, 2006
 
2.
an emoticon used in chat and email.

Shows a face with a bead of sweat on its forehead. Usually expresses nervousness or unease. Inspired by anime sweat drop expressions.
person 1: 'I woke up hung over in a strange bed this morning'
person 2: -.-'
by lespigeon June 23, 2011