The phrase "cardigan combo" refers to a combination of clothing items that includes a cardigan, which is a type of sweater or jacket with buttons in the front. Full definition
It's another one of my «uniforms», I love this top + skirt + cardigan combo. (bluecollarredlipstick.com)
By using the velvet rope to tie the cardigan around your waist, it makes the slip dress / cardigan combo super cool and less basic, looks flattering on your body, and is also really practical by keeping you warm. (stylebythepeople.com)
Mother - of - pearl has the loveliest colour and shimmer... and it complements your white dress and ivory cardigan combo perfectly. (nancysfashionstyle.com)