The act of risking one's life or safety to achieve a goal by purposefully entering dangerous, and often deadly, territory.

ORIGIN: From Lt. Col. Ronald Speirs who, during the Battle of Bastogne, ran through a German occupied town, past troops and even a tank, to meet up with a platoon and relay an order, as they had no radio. He then turned around and ran back to meet up with his squad.
"In Call of Duty yesterday, I pulled a Speirs and got a 7 killstreak."

or, can be used in non-deadly situations:

RICK: "Holy shit!"
PAUL: "What?"
RICK: "The running back just pulled a Speirs and scored a touchdown!"
by George Lulz May 22, 2011
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