(informal) Fast; speedy.

What do you mean by nippy?

1 : marked by a tendency to nip a nippy dog. 2 : brisk, quick, or nimble in movement : snappy a nippy boat nippy tennis players. 3 : pungent, sharp A mixed salad and a nippy potato salad.—

Why do they call it nippy?

Beginning in the late 19th century, a J. Lyons waitress was called a "Gladys". From 1926, because the waitresses nipped (moved quickly) around the tea shops, the term "Nippy" came into use. Nippies wore a distinctive maid-like uniform with a matching hat.