The term 'OY ___!' can be completed with the following crossword solutions: VAY (3 letters), VEY (3 letters), ALAS (4 letters), ACK (3 letters), AHME (4 letters), UHOH (4 letters), and METALLICMIXTURE (15 letters). VAY and VEY are both Yiddish interjections that express surprise, dismay, or sorrow. ALAS is an exclamation of grief or regret. ACK is an informal expression of acknowledgement or recognition. AHME is a Yiddish expression of surprise or dismay. UHOH is an expression of surprise, worry, or dismay. METALLICMIXTURE is a combination of two or more metals.