An elite crew of good-looking men who have banded together in order to fulfill the dreams of a nation. Can be seen regularly in Denver bars having more fun than you. Manteam has also been spotted in Austin, Vegas, and other cities that don't suck. A few ladies have also attained membership into this elite club.
"Dude, who the hell are those guys with those impressive dance moves and flock of ladies?", "That's Manteam dude. Man they are good-looking."
Any half-hearted and disingenuous attempt by the mainstream to pass itself off as new, nonconformist, or anti-establishment.
vb. mainstream ("normal", trendy, majority, conformist, establishment) + steam (to let off steam or relieve pressure)
"GAP is donating half of the sales on red items to support Women's Rights in the Third World!"
"They're just mainsteaming. don't believe that crap."
...
"I went to a hippie festival last month to check out the scene, but I realized I was just mainsteaming. I don't actually understand their deal."
like manspreading, but with one's music on the speakers far too loud and ultimately loud enough for everyone in the vicinity to hear even if they don't want to
Chae, Ikaia, Hetrick, and Ian were manstreaming Big Bootie outside today while playing beer die.