To get a rake in your face is to be turned down when you ask someone out. When one thinks about it, one would say that the image is good to represent the feeling felt when turned down, which is similar to that of stepping on a rake, it's embarassing and hurts :)
This can said for boys and girls
"did you Ask her out?"
"It's a rake..."
"He asked her out yesterday but she said no, he got a rake in his face"
"Did you Get a rake in your face with that girl?" "yeah... She said no in front of all her friends it was so embarassing..."