(a) güçlükle başarmak/idare etmek/geçinmek. He's not a good student, he can only rub along in class.
She was able to rub along on the money her father gave her by giving English lessons. (b) geçinmek, anlaşmak. My wife and I seem to rub along (together) all right.
English-Turkish translations from the Atalay Dictionary, First Edition