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big old

a. (context US idiomatic informal chiefly Southern US English) Emphatically or impressively big; really big. alt. (context US idiomatic informal chiefly Southern US English) Emphatically or impressively big; really big.

Usage examples of "big old".

He always imagined growing up back in the 1950s in some kind of traditional family in a big old mansion.

He has a jaunty bandanna tied around his neck and appears to be wearing a big old doggy grin.