scrape (up) an acquaintance with sb. 设法接近（结识）某人

A：Look, that guy over there is trying to scrape up an acquaintance with Joanna.
B：I know that man. He is always after pretty girls.
A：看，那边那个人正在和乔安娜套近乎呢。
B：我认识他。他就爱追着漂亮姑娘。