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1. Full throttle, sinking to the hilt, literally or figuratively.
2. Highly favorable defensive position which offers an unobstructed field of view.
3. Depth of coitus.
4. Willingness to go bag deep (take the whole shaft) to obtain something.
"He went bag deep to break that tackle and get that touchdown."

"I didn't know if her roommate was home so I went bag deep to watch the front door."

a."I think I bruised my pelvis." b."Oh, you went bag deep?" a."Yeah, a real hammerjacking."

"Damn, he's bag deep after that promotion."
by jagerhall March 09, 2011
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