Sha'Carri Richardson clearly didn't have much remorse in the immediate aftermath of shoving Christian Coleman into a wall ... as new police video shows she not only lied about the incident to cops, but repeatedly called her Team USA star boyfriend "a coward."
The frenetic scene unfolded on July 27 at the Seattle-Tacoma International Airport ... just minutes after Richardson was seen getting physical with Coleman during a dispute near a security checkpoint.
Port of Seattle Police Department body camera footage shows multiple officers arriving at the site to question Richardson and Coleman about the altercation .