You can attempt to move through a hostile creature's space, forcing your way through by overrunning the hostile creature. Make a Strength (Athletics) check contested by the hostile creature's Strength (Brawn) check. You have advantage on this check if you are larger than the hostile creature, or disadvantage if you are smaller. If you win the contest, you can move through the hostile creature's space once this turn.
If you have advantage, then the hostile creature must make a Dexterity saving throw against the lower of the two d20s. If it fails, it is knocked Prone or shoved 5 feet to the side.