The futile act of relentlessly arguing a position to a person or audience, knowing they have already rejected it. Often the goal is not to convince anyone, but to antagonize dissenters, congratulate oneself for excellent arguing, or perhaps to instigate an entertaining or damning reaction.
"Should I even talk to my mom about climate change? Nah... that would be pointless crusading."

"I was up til 4am crusading for trans rights on conservative Twitter. You should see the screenshots."

"No crusading in the comments, guys."
by Kickflipper November 9, 2018
1) A Crusader is someone who joined the Pope sanctioned wars in the 11th, 12th, and 13th century. They usually joined the Crusades to cleanse their sins or show devotion to God.

2) A staunch attacker of a certain belief, act, etc.
1) The Knight of France was on the Crusade to show that he was a pious supporter of God.

2) Jordan is a Crusader against pedophilia.
by The Pagan Warrior June 26, 2010
A member of the Roman Catholic medieval order charged with reclaiming Christian and Jewish lands in the middle east. Ages later, crusaders became more universally known as Christian warriors whom play a ceremonial role in protecting the Roman Catholic Church.
Reginald was a medieval crusader in the 1300s.
by Nicolai March 30, 2004
When you go out and eliminate all thots in the area/country/world
Let’s go on a crusade to rid the world of thots
by Ryan Buttersworth August 5, 2019
The Crusades were a several centuries delayed response to Islamic jihad. When Pope Urban II called the First Crusade in 1095, the followers of the prophet had already spread across the Middle East and North Africa by force.
People who think the Crusades preceded Islamic jihad have been brainwashed by politicial correctness.
by colonel jack mustard February 13, 2010
The crusades were pope-sanctioned military endeavors during the 11th, 12th, and 13th centuries against non-Christians. Goals included capturing Jerusalem and expanding territories in general.
Christian occupation of Syria disappeared after the ninth crusade.
by Tom November 20, 2003
A popular pastime during Middle Ages in which participants celebrated the King of Peace by raping and slaughtering every Muslim in sight. Generally considered the beginning of the age-old Christian tradition of killing those who are different from them.
Muslim: Welcome to Jerusalem!
Crusader: (cuts Muslim's head off) Yay crusades!
by nehpets ttelfihs December 30, 2011