To þorbjörga, or "thora" for
short in english, means to start talking and flirting to a person and then have consensual sex with another person, or friend of said person, without their knowledge.
þorbjörga is a common Icelandic
slang used in eastern Iceland. It is pronounced "thor-bjourga", "thora" for
short.
"A friend of mine was þorbjörged(thored) by this
chick the other day, I've been trying to
cheer him up since."
or
"A friend of mine was þorbjörged(thored) by this
dude the other day, I've been trying to cheer her up since."
"she/he is such a þorbjörga(thora), I can't believe her/him"