Top definition
The phenomenon whereby groups of males suddenly appear out of nowhere due to the presence of attractive women, free beer, a neighbor's barbecue, running power equipment, or anything else that would draw men like flies.
--That's strange...It was all hot chicks in here just a minute ago when I got up to use the terlet, and when I came back, the bar was swarming with guys!

--Classic case of maninfestation! I saw it on Discovery Channel.
by palabrajot October 05, 2010
Get the mug
Get a maninfestation mug for your Aunt Helena.