[Spiffy]

Came from that odd English word from centuries ago, "spiffing", which was often used in the sentence "Truly spiffing, old bean." Now it has been changed for most teenagers in America and England to use. Sometimes said or typed as SPIFFEH, or spiffahhh/spiffehhh.

Random Person 1: Did you see that thing on TV??
Random Person 2: Yeah, it was SPIFFY!!