A motion to strike is a legal request made to a court to remove certain parts of the opposing party's pleadings. This can include irrelevant, redundant, or legally insufficient material from a complaint, answer, or other legal documents.
A dismissal with prejudice means that the case is closed permanently. Once a case is dismissed with prejudice, the plaintiff is barred from filing another lawsuit on the same grounds. It's equivalent to a final judgment against the plaintiff and means victory for the defendant.
A motion to dismiss asks the court to dismiss either whole or part of a complaint, counterclaim, or crossclaim. Motion to strike or "Demurrer": In some jurisdictions, a motion to strike or a "demurrer" is the equivalent to a motion to dismiss for failure to state a claim upon which relief can be granted.
(f) Motion to strike. Upon motion made by a party within 30 days after the service of the pleading upon him, or upon the court's own initiative at any time, the court may order stricken from any pleading any insufficient defense or any redundant, immaterial, impertinent, or scandalous matter.
In the formal legal world, a court case that is dismissed with prejudice means that it is dismissed permanently. A case dismissed with prejudice is over and done with, once and for all, and can't be brought back to court.
Pleadings do not ask the judge to make decisions. Motions, on the other hand, ask judges to make decisions. Motions are mostly written but can be oral requests that can be presented only after the complaint has been filed.
As with all motions, a motion to strike must state with particularity the grounds for seeking the order to strike, as well as the relief sought. FRCP 7(b); Smart Code®. Under FRCP 12(f), the court may strike from a pleading an insufficient defense or any redundant, immaterial, impertinent, or scandalous matter.