Entering the practice gym, signing an endorsement contract, and completing an NBA match in MyCareer mode generally prompts a three to ten minute cutscene in NBA 2K18. This may be annoying for some players who only need to play and enhance their MyPlayer. Mashing buttons on your control won't skip the cutscene since there's no way to bypass these long animations and dialog normally.
After every NBA game, a few match stats will show up on the screen while DJ and company gradually walk towards their locker room. Besides this lengthy animation, there is a big chance you will encounter a cutscene with either security guy, Boo Boo, along with teammate Shammy Wells fooling around or your own character with an interview. To skip these cutscenes, just bring up the party menu on your computer and join a buddy who's playing NBA 2K18. Doing this brings you The Neighborhood, basically bypassing the cutscene.
Before bypassing cutscenes, make sure you allow the game complete auto-saving to ensure your progress is recorded. Additionally, to ensure you make your VC rewards, only skip the cutscene once the golden coin VC icon appears on the lower right side of the screen.
Sadly, there's no workaround to skip the other cutscenes in MyCareer as well as The Neighborhood, which is understandable since the programmers likely want players to watch all of the labors of their effort in creating dialogue and cartoons. https://www.nba2king.com/