1N-COUNT 弥天大谎 If you describe a lie as a whopper, you mean that it is very far from the truth. 弥天大谎 [informal]
...the biggest whopper the president told.
总统撒的弥天大谎
2N-COUNT 特别大的物体;庞然大物 If you refer to something as a whopper, you mean that it is an unusually large example of the thing mentioned. 特别大的物体;庞然大物 [informal]