A made up word used by Patrick Jane in "The Mentalist" Season 3, Episode 20. He uses it to avoid conversation with Lisbon and Rigsby.
*Lisbon and Rigsby get on the elevator*
Jane: Oh, damn. I forgot something. Uh, I’ll meet you there.
Lisbon: Forgot what?
*elevator dings*
Jane: Uh. My, uh, frumbahollymorgansterning.
A thrift shopper who will stop at nothing to get a bargain; including trampling store employees to death. The term is a combination of "frugal" and the Spanish suffix "-ista" which connoting someone who is dedicated to a cause.
Black Friday saw the emergence of a new breed of shopper, the frugalistas, as they stampeded into a store for Christmas shopping; trampling an employee to death.