knock on
• be growing old.
• "she's knocking on a bit"
• unlawfully drive the ball with the hand or arm towards the opponents' goal line.
• "the scrum half knocked on and the match was over"
knock-on
noun
• a secondary, indirect, or cumulative effect.
• "movements in oil prices have knock-on effects on other fuels"
• an act of knocking on, for which a penalty or scrum is awarded to the opposition.
