The feeling of satisfaction you get when eating a 'Splice' iceblock on a hot day. Cross between Splice and Epic.
Brad: Oh man, this Splice is Spliffic.
Fergus: Is that a new word?
Brad: Yeh made it then, gona add it to urban dictionary tonight.
Fergus: Not if I do it first.
Brad: *sigh* You full would, as your a no life twat....
a wrod to say when something is VERy cool. it fills in the blank;
there are other forms too: spiff, spiffy, spifferific, spiffulous, spiffacious, spifferoo