Know no more about than a frog knows about bedsheets American verb phrase mainly US
Used to say that someone knows absolutely nothing about something.
Don't let Peter design the computer programme. He knows no more about computers than a frog knows about bedsheets.
Stop boasting! You know no more about Beijing opera than a frog knows about bedsheets.
Linda knows no more about music than a frog knows about bedsheets. She can't distinguish which is the treble or bass clef.
To know powerful and influential people who can support you
To bring something or somebody to the center of attention
To have lots of information about a topic that is usually not widely known.
Don't rush into doing something advanced before you know the basic skills, techniques and primary details
A group of bad or sinful people
You'd better stay away from them. They are a nest of vipers.