know the difference between one's ass and one's elbow

短语

词形变化

knows the difference between one's ass and one's elbow 三单 knowing the difference between one's ass and one's elbow 现在分词 knew the difference between one's ass and one's elbow 过去式 known the difference between one's ass and one's elbow 过去式 known the difference between one's ass and one's elbow 过去分词

释义与例句

v.
  1. 1.

    Synonym of know one's ass from a hole in the ground.