A body-to-body interruption borrowed from irimi - 'entering' - where you close distance on your terms rather than absorbing pressure on theirs.
Interrupt their forward pressure with a concealed shoulder line that resets distance.
When they walk you down, don't retreat. Load your rear leg, drop your center a hand's width, and drive your lead shoulder into the pocket between their shoulder and chest.
Contact is deltoid, not collarbone or head. The intent is interruption, not injury. Their march stops, their breath catches, and for one beat their hands drop.
That beat is the technique. Exit at a 45° angle away from their strongest side and return to guard. The shoulder check is a comma, never a period.