The phrase "real downer" means something that makes you feel sad, disappointed, or brings your mood down.
Sentences with «real downer»
I like meeting new people in real down to earth. (doulike.com)
These pillows, which come in packs of two, are just as comfortable as real down pillows, but you can get them without breaking the bank. (thespruce.com)
I don't know about you but last week I started to get real down about the fact that its been extra gloomy outside. (tweedandlace.com)