If a waiter needs a table for two, they might call for a two-top. This restaurant lingo, referring to the amount of place-settings needed, comes from a larger body of terms. Anthony Bourdain's book Kitchen Confidential is a good source of additional slang from kitchens around the world. This is part of a complete episode.
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I spent two years living in Spain and loved learning the many gestures they use there. They do the gesture of hitting your elbow to mean "tacaño" (stingy), too. I heard that it is supposed to evoke striking a stingy person's elbow to get them to release the money they are holding tightly in their hand.