rub up on

Refresh one's knowledge, as in I must rub up on my French before we leave for Paris. [Second half of 1700s] Also see brush up, def. 2.

To refresh one's knowledge of: I have to rub up on my French.

Name	Pronounced	Usage
Lyndon	['lindn]
Jillian	JIL-ee-ən	English
Ashby	['æʃbi]
Masamba	-	Eastern African, Yao
Chananyah	-	Biblical Hebrew
Thaddeus	[θæ'di(:)əs]