Floyd Mayweather is fighting this weekend, but the boxing legend didn't seem too fazed about the bout on Thursday ... partying it up with Jamie Foxx to celebrate his birthday!!
TBE welcomed all his friends to Restaurant Ours in London to honor his 46th trip around the sun ... and the bash had a ton of booze, an incredible cake -- and of course, huge tributes to the man of the hour.
THE NAME'S MAYWEATHER...FLOYD MAYWEATHER
Foxx looked like the life of the party .