This would basically be a missile-style projectile that, when it hits the hul, instead of exploding, latches onto the target. It hangs there for a certain delay, slowing the ship with its weight. Then once its timer runs out, it explodes dealing damage directly to the armor, or to the hull modules if armor is exhausted.
Just a random thought that sounded possibly useful and probably not too difficult to implement. Would make for a decent race-specific kind of weapon too.