ATTABOY

(slang) an exclamation of approval or encouragement. (A corruption of "that's the boy," this expression is also seen as "that's a boy" and "thataboy.") —SHSBC Binder 13 Approved Glossary, —SHSBC Binder 14 Approved Glossary, —SHSBC Binder 22 Approved Glossary

(slang) an exclamation of approval or encouragement. (A corruption of "that's the boy," this expression is also seen as "that's a boy" and "thataboy.") (slang) a variation of that's the boy. See that's the boy in this glossary.a variation of that's the boy.