[Name]-neechan/-neesan: Older sister; respectful tag after the name

[Name]-niichan/-niisan: Older brother; respectful tag after the name

[Name]-kun: A tag after the name as a sign of affection (usually it's adults to kids; for example, Ran calls Conan, "Conan-kun")

[Name]-chan: A tag after the name to show friendship or affection {between close friends)

[Name]-san: A tag after the name used in formality (English equivalent of Mr. or Miss)

Baka: Idiot. It's not really that bad a word in Japanese. In fact, someties it's used as a sign of affection ^^

Kuso: A curse word.