The phrase "biggest transfer" refers to the largest amount of money or resources being moved from one person, organization, or place to another. Full definition
But everything has gone cold on big names especially those with big transfer fees. (justarsenal.com)
We'll see about him, we aren't in an emergency and there isn't really a reason to spend big this transfer window. (italianfootballdaily.com)
It looks like lots of teams are having trouble getting big transfers done, or are waiting around to see what shakes out over the next few weeks. (7amkickoff.com)