Hello! Fancy seeing here now. what a surprise...

here , what does Fancy mean?

i'm very beginner for english language... please help me
Interesting question. Fancy here is a verb, and the verb means 'imagine'. We have a related saying, 'Imagine seeing you here!' Still the expression ('Fancy -ing...') is more a fixed phrase than a real expression of imagination; it expresses (usually mild) surprise.

Well, I won the bingo game! Fancy that!
Fancy riding in a carriage with the Queen-- I never thought I'd have the chance.
Mister Micawber, What a Explanation for my Question. Thanks a lot .............