a snappy title or phrase is short, clear, and often funny:
We need a snappy title for the book.
Keep your answer short and snappy.
2 especially British English
quick to react in an angry way [= irritable]:
She seemed snappy and impatient.
There's no need to be so snappy with the children.
3 also look snappy British English informal
used to tell someone to hurry:
Get me a drink and make it snappy.
4 British English informalDCC
snappy clothes, objects etc are attractive and fashionable:
a snappy suit
snappy dresser (=someone who wears fashionable clothes)