The French word 'frisson' signifies a brief sensation usually reported as pleasurable and often expressed as an overwhelming emotional response to stimuli, such as a piece of music. Frisson often occurs simultaneously with piloerection, colloquially known as 'goosebumps', by which tiny muscles called arrector pili contract, causing body hair, particularly that on the limbs and back of the neck, to erect or 'stand on end'.[54][55][56][57]

Allen verified in a 2016 interview that she purposely selected these terms because they were more objective, comfortable, and clinical than alternative terms for the sensation.[10] Allen explained she selected the word meridian to replace the word orgasm due to its meaning of point or period of greatest prosperity.[clarification needed][citation needed]