Source : WordNet®

chummiest
     See {chummy}

chummy
     adj 1: (used colloquially) having the relationship of friends or
            pals [syn: {matey}, {pally}, {palsy-walsy}]
     2: (used informally) associated on close terms; "a close
        friend"; "the bartender was chummy with the regular
        customers"; "the two were thick as thieves for months"
        [syn: {buddy-buddy}, {thick(p)}]
     [also: {chummiest}, {chummier}]