1. Flaccid penis
2. Not being able to sexually perform due to either performance anxiety, or too much alcohol or drugs.
3. Reaction to something unattractive or uncool
Guy 1: Did you fuck that girl last night?
Guy 2: I took her home, but I got hajmadilla
Guy 1: I hate when that happens
That 300 pound girl who won't shut up in my econ class is giving me a hajmadilla