One whose ballsack is screwed on tight. One who is aggressive & tough, who can take on anything and who doesn't take shit from anyone.
Thomas is definitely ballsackian. He doesn't give a damn who he tells off.

What the lieutenant did was ballsackian. He took his recon team of 6 men 20 miles behind enemy lines for a week and inflicted heavy casualties upon the enemy.
by SixCHUCKSeven November 16, 2007
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