"To strike the pleadings" is a legal term that means to completely disregard or remove a party's entire set of arguments or claims in a lawsuit. It basically erases their side of the case, as if it never existed. Full definition
The appellant husband appealed the order of the motion judge striking his pleadings for failure to comply with court orders and allowing the wife to amend her application. (jessicagagne.ca)
In Mostar Directional Technologies Inc. v Drill - Tek Corporation et al., 2017 FC 575, on a motion to strike brought by a defendant, the Prothonotary struck the pleading and dismissed the case on the basis the statement of claim pleaded no material facts... [more] (slaw.ca)
InEustace, the ONCA confirmed that judges can not strike pleadings of their own initiative, absent a motion by one party for such relief. (jessicagagne.ca)