when you feel as if you're obligated to go out on a date with someone. I.E: a blind date, an old boy/girlfriend or just someone who has the funds to feed you for one night.
"Sorry Julie, I woud love to go out with you Friday night but the ex keeps calling and wanting to hang out with me, I have an oblidate."
"Josh isn't that cute or funny but I sure am hungry. I guess an oblidate is in order."