You shove a creature, either to knock it Prone or push it away from you. The target of your shove must be no more than one size larger than you, and it must be within your reach.
You make a Strength (Brawn) check contested by the target’s Strength (Athletics) or Dexterity (Acrobatics) check (the target chooses the ability to use). If you win the contest, you either knock the target Prone or push it 5 feet away from you.