The Collaborative International Dictionary of English v.0.48:

Giffy \Gif"fy\, n. [Obs.]
   See Jiffy.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Jiffy \Jif"fy\, n. [Perh. corrupt. fr. gliff.] [Written also
   giffy.]
   A moment; an instant; as, I will be ready in a jiffy.
   [Colloq.] --J. & H. Smith.
   [1913 Webster]