Oxlade chamberlain if anyone mentions liverpool winning the league henderson shuts them straight down
I think you might be referring to Alex Oxlade-Chamberlain, a midfielder who has played for Liverpool since 2017. And I'm guessing you're referring to a humorous anecdote about Jordan Henderson, the Liverpool captain, being quick to shut down anyone who mentions the team winning the league.
For those who might not know, Liverpool won the Premier League title in the 2019-2020 season, ending a 30-year drought without a top-flight title. It's likely that Henderson, being the captain and a key player, has had to deal with a lot of attention and congratulations from fans and media alike.
The joke is probably that Henderson is so used to being asked about the team's title chances that he's developed a quick wit and a sharp tongue to deal with anyone who mentions it. Whenever someone brings up the topic, he "shuts them straight down" with a witty remark or a playful jab.
I hope that's the kind of humor you were referring to!