lemon drop (thing)

A yellow, sugary, and sour lemon flavoured hard candy. American ones are very very sweet, while British ones are delightfully sour and sometimes dusted in powdered sugar to cut the intense sour-ness and keep them from sticking to the wrapper.

Also, a shooter consisting of a shot of lemon vodka served with a slice of lemon dipped in white sugar. Gulp the vodka, then immediately stick the sugar coated lemon in your mouth. Mmm.