ダチFreq.FrequencyTop 50,000Meanings1nounfriend; pal; buddycolloquial›Colloquial slang derived from 友達 (ともだち). Used in casual speech, often among young people or in rough male speech.See also: 友達あいつは俺おれのダチなんだ。That guy is my buddy.ダチと遊あそびに行いく。