There are two meanings to this phrase. The first is a woman turns heads due to her beauty, the second is she turns heads away so they won't vomit at an unattractive person!
Individuals who take an issue and stick with it or protest it for about a week; a mob of liberal environmentalists concerned about everything but doing little about it
The Gen Z teenagers (typically in high school) with those stupid haircuts that are long and curly on the top, and short on the sides, resembling a head of broccoli. They are also typically very thin and don't lift, perhaps due to low T.
Damn, the broccoli heads in my 7th period gym class never lift, they just sit there on their phones and talk.