reward car n. an (extravagant, frivolous, or impractical) automobile purchased as a gift to oneself when financial or personal goals have been achieved. (source: Double-Tongued Dictionary)
Further reading
Quiz Guy John Chaneski is buying super-personalized presents for his friends and family, all based on each recipient’s first name. For example, John purchased an almanac for Al and some patchouli for his friend Pat. Your job is to guess what gifts...
Don’t show up with your arms swinging is a way of telling a would-be guest not to show up at their hosts’ empty-handed; they should always bring along a gift. Similar admonitions include Ring the door with your elbow and Come with your arms crooked...