know if one is coming or going

[know if one is coming or going] or [know whether one is coming orgoing] {v. phr.} To feel able to think clearly; know what to do. -Usually used in the negative or with limiters.

On Monday, the carbroke down; on Tuesday, Mother broke her arm; on Wednesday, thechildren all became ill with the mumps; by Thursday, poor Fatherdidn't know if he was coming or going.

My cousin is so much inlove that she scarcely knows whether she's coming or going.

Compare:IN A FOG.