can't punch one's way out of a paper bag
Be inept, as in Ask him to program the VCR? He can't punch his way out of a paper bag. This hyperbolic term for extreme ineptitude originally was an expression of contempt for a weak or cowardly boxer. [Slang; c. 1910]
Words nearby can't punch one's way out of a paper bag
can't help,
can't hit the broad side of a barn,
can't hold a candle to,
can't make a silk purse out of a sow's ear,
can't make head or tail of,
can't punch one's way out of a paper bag,
can't see beyond the end of one's nose.,
can't see the forest for the trees,
can't seem to,
can't stand,
can't wait