dirty ice cream
A guy you date once, and they won't stop calling you. They are a good enough catch that you would date them again, but the fact that they are too persistent makes them less desirable like dirt on ice cream.
I had a great date last night, but then he called me 26 times since; he's just like dirty ice cream.
Dirty Ice Cream
Taking something good and making it undesirable, such as putting dirt on ice cream.
I went on a first date with this girl and she was pretty hot and really funny, but half-way through she asked me if I would ever consider asking her to marry me. Talk about dirty ice cream.
Dirty Ice Cream Machine
The sexual act of laying underneath a man's anus, firmly grasping his erection, and pulling downwards as if preparing a soft-serve ice cream cone while he proceeds to defecate (poop) directly into the mouth of an ice cream-lover.
"You know Shelby? Yeah, I totally gave her a Dirty Ice Cream Machine last night. She really loves chocolate."