erk exclamation 2noun 1forms 1 exclamation2 •(informal) An expression of trepidation; eek. •(Australia, informal) An expression of revulsion or disgust; yuck.‘Gawd, erk!’ She recoiled and turned away. — 1959 noun1 •(UK, slang) A member of the groundcrew in the RAF.But I wasn’t accepted for flying duty—eyesight failed me. Neither was Frank, which, I’m ashamed to say, I found a relief. We were both channelled as aircrafthands, known to everyone as erks. — 2004 formserks