NCT 127 track that you should listen without thinking too much about what meaning behind 'Whiplash' title because Geniuses (mark and taeyong) wrote this song .

Severe injury sustained from repeated "head-banging".

When a friend is who normally associates with you acts cold to you for no apparent reason and it makes your head spin, hence, whiplash. Can be with a boyfriend or girlfriend as well, though used more in non-dating context.

A phony injury people claim they have when they are in a car accident.

Whiplash is a bop made by NCT 127 composed by Mark Lee and Lee Taeyong

When you slap someone with your cock and their head snaps back

a character iron-man faces. he uses electric whips to slice through anything. his whips can also be used for cutting toast into triangles.