Top definition
When someone takes your email thread from one topic completely off topic to some other subject.
Tim:
Email Subject: Snowboarding this weekend
Hey, anyone want to ride Hunter this weekend?

reply:
Will:
Email Subject: Snowboarding this weekend
Hey, I got a really cool macbook air, this thing rocks and kicks the ass of any Microsoft junk you tools use

Tim:
Email Subject: thread jacked MS vs Apple (was Snowboarding)
Damn I hate it when I get thread jacked.

by SoCal or bust March 19, 2008
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