Hold Up or Help Up
  

The expression “hold up” has several different meanings. One is a robbery. A man with a gun may say, “This is a hold up. Give me your money.” Another meaning is to delay. A driver late for work may tell his boss, “I was held up by heavy traffic.” Someone who was robbed on the way to work might say, “Sorry, boss, I was held up by a hold up.”
 
Still another meaning of the expression is for a story to be considered true after an investigation. The same driver late for work could say, “My boss did not believe a hold up held me up. But the police confirmed what I said, so my story held up.”

Remarks: Above sentences are excerpted from VOA's website.