Transfer

Fabrizio Romano's catchphrase for confirming a transfer is done. When he tweets "Here we go!" millions of followers know the deal is agreed. It's become the unofficial official announcement in football - fans refresh his account constantly during transfer windows waiting for those three words.

A transfer involving players going both ways rather than just cash. Sometimes straight swaps, sometimes player plus cash. Gets discussed more than it actually happens because valuations rarely match up and both players need to want to move. Sounds simple in theory but the negotiations are complicated because you need four parties to agree (two clubs, two players).

Contacting a player under contract without their club's permission, trying to convince them to push for a move. Against FIFA rules and can result in bans, but everyone assumes it happens constantly because it's hard to prove. Usually goes through agents rather than directly. Clubs accuse each other of tapping up whenever a player starts agitating to leave.

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.