Similar to a boss usually met in the middle of a level and weaker than a boss.
"The mini-boss in the 3rd level of Ikaruga is harsh"
by Brian Johnson April 10, 2004
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1) A co-worker who acts like the boss. 2) A beta male who pretends to be an alpha or leader.
The guy at the desk next to me is such a mini boss.
by JohnDoe121 April 14, 2018
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