Destrudo is a term introduced by Italian psychoanalyst Edoardo Weiss in 1935 to denote the energy of the death instinct, on the analogy of libido and thus to cover the energy of the destructive impulse in Freudian psychology.
Frisson (French for 'shiver') is a sensation somewhat like shivering, usually caused by stimuli other than cold. It is typically expressed as an overwhelming emotional response combined with piloerection (goosebumps). Stimuli that produce a response are specific to the individual.