合い口あいくち Noun English jmdict 1 noun (common) (futsuumeishi) chum;pal 2 noun (common) (futsuumeishi) dagger;stiletto See also: 匕首 (あいくち) 3 noun (common) (futsuumeishi) sumo unbalanced record of wins between two wrestlers Other forms 合口 【あいくち】 · 相口 【あいくち】