Tell them your willy wonka's evil nephew n u sell poisonous gum drops. Tell them you are a road sign redistributor, you steal road signs and sell them to your friends. You can make up outrageous shit and they will just laugh n u can transition out if you are embarrassed. Another thing I think is probably happening, is that you feel shitty about your job so u project that. They ask n u r like "oo I park cars

". Then they feel like its a shitty job, because you aren't pumped on it. If a girl is into you, she will attempt to match your state, but if your state shifts to embarrassed, she will shift accordingly. The key isn't what you do, its how you present it. You could be like. I work for so-n-so and get to drive around 100k cars, its actually cool as fuck n she will be like oo that sounds fun! Its all in how u present it my friend, and guess what...THERE IS NOTHING WRONG WITH YOU JOB, AND NOTHING WRONG WITH DOING WHATEVER YOU HAVE TO DO TO SURVIVE.
Hope this helps buddy, keep your head up.