The action where one male feels intimidated by the presense of another male while in the company of a female (or potential partner) and puffs his chest out as a form of peacocking.
When I met NayNay at the game, her boy Micah totally Mongoosed me. Like I'm a threat to take NayNay away.
To experience overwhelming feelings of amazement, astonishment surprise, happy shock, dumbfounded-ness, flabbergasted-ness...at the sight of a mongoose... or other people, places, or things that bring about such feelings described above.
I was mongoosed when I happened upon a one-eyed, albino, and rabidhamster in my path on the way to bible study.