Detrimental is an adjective that means harmful or tending to cause harm. It can also be used to mean prejudicial, disadvantageous or counterproductive.
The opposite of friends with benefits. A close friend who relies on you emotionally but there is no physical intimacy Involved. See also: HMNR.
I've known Leila for three years. She calls me up to talk whenever she has a fight with one of the losers she happens to be seeing. I like her a lot but we are totally just friends with detriments.