Robbie

Arsenal's 2003-04 squad that went the entire Premier League season unbeaten: 26 wins, 12 draws, 0 losses. The first team to do it in modern English football. Arsène Wenger built a side mixing French technique (Henry, Pires, Vieira) with English grit. The unbeaten run reached 49 games before Manchester United ended it in October 2004. It's hard to imagine anyone doing it again.

A player so good they only come along once in a generation. Gets overused - not everyone can be generational or the word loses meaning. True generational talents change the game and dominate for years. Messi, Ronaldo, Mbappé fit the definition. Calling every promising youngster generational has become a running joke because it happens so often now.

An unofficial understanding between a club and a player that they'll let him leave if a certain type of offer comes in, even if his contract doesn't include a release clause. Used to keep players happy and committed without giving up all leverage. The problem is they're unwritten and unenforceable, so clubs sometimes deny they exist when big offers arrive.

An agreement to sign for a new club that can be made when a player has six months or less on their current contract. The player sees out their deal, then joins the new club on a free. Big clubs hate it because they lose valuable players for nothing. Players and agents love it because all the money that would've gone to the selling club can go into wages and signing bonuses instead.

Roll the ball up the back of your standing leg and flick it over your head, over the defender, and collect it on the other side. The ball arcs like a rainbow. High-risk, high-reward, and often considered showboating if you do it when you don't need to. When it works, it humiliates the defender. Neymar does it regularly and has drawn angry reactions from opponents who didn't appreciate being embarrassed.