casual speech; friendly language
Refers to the informal, casual way of speaking used among close friends, often characterized by plain forms, slang, and dropped particles.
It's normal to speak in casual speech among close friends.
Using casual speech with a superior is considered rude.
タメ語 is a slangier term for casual speech among peers, often implying equal status, while 友達言葉 is a more neutral description of friend-style language.
敬語 is the polite or honorific speech used in formal situations or toward superiors, the opposite of 友達言葉.
Compound of 友達 (friend) and 言葉 (language, speech).