Word of the Day / Yok
A handy term to cut someone short may have gotten its start with the hapless Ottoman navy.
You're just starting to learn some basic street Hebrew and feel all warm and fuzzy for realizing that "nudnik" in Hebrew really does mean nudnik. You share your delight at your budding linguistic talent with some Israeli sitting next to you on the bus, and he mutters: "You spik Hebrew? Yok."