1 a fruit
2 a way to describe something thats bitter sweet, like lemonade.
3 a way to describe something that sucks
4 an enduring nickname giving to ones lover
ok, primarily, its a citrus fruit (duuuuuh) but its also slang for lesbian. its a teen subculture kinda word and noone over the age of like, 25 really uses it.
Unlike banana, a Lemon would be an Asian that seems completely Asian in looks and character. A Banana would be "yellow outside, white inside." A lemon would be "yellow in and out."