"Can you top this whopper?"
What does top mean in this sentence?
[STRIKE]
???[/STRIKE]
As always, without context, we can't be completely sure but it probably means "beat".
Imagine two people have been fishing. One of them catches a very large fish and he shows it to his friend, saying "Look what I caught! Can you top this whopper?" meaning "Look at the size of the fish I caught. Can you show me a bigger fish that you caught?" In that context, the person could also just say "Can you top this?" as he shows the huge fish.