Piss and Vinegar

You gain proficiency in the Intimidation skill if you don't have it already. Additionally, you gain a bonus to checks using this skill equal to your Strength modifier (minimum bonus of +1).

Intimidation

You have mastered the art of the enraging insult. As a Bonus Action, you can provoke a creature within 60 feet that can see or hear you. That creature must succeed on a Wisdom saving throw or take Psychic damage equal to a roll of your Fisticuffs die plus your Constitution modifier and have Disadvantage on any attack rolls it makes against creatures other than you until the start of your next turn. The saving throw DC for this and all other features from this subclass equals 8 plus your Constitution modifier and Proficiency Bonus.

You have a few tricks up your sleeve to even the odds when the going gets tough. You can use one of the following Dirty Tricks. You can use one Dirty Trick each turn, and once you use a dirty trick, you can't use that trick again until you finish a Short or Long Rest.

Heelstomper. When you deal damage to a creature with an Unarmed Strike or Pugilist weapon, the creature must succeed on a Dexterity saving throw or its Speed is reduced to 0 for one minute. An affected creature can repeat this saving throw at the end of each of its turns, ending the effect on a success.

Low Blow. When you deal damage to a creature with an Unarmed Strike or Pugilist weapon, you can hit the creature below the belt.

When you do, the creature must succeed on a Strength saving throw or attacks against the creature have Advantage until the end of your next turn.

Pocket Sand. As a Bonus Action, you toss detritus into the eyes of a creature within 10 feet. The creature must succeed on a Constitution saving throw or have the Blinded condition until the end of its next turn.

You can offend every creature in the room with the flick of a wrist and a few curt words. As a Bonus Action, you can choose a number of targets within 30 feet of yourself that can see or hear you up to your level in this class. Each chosen creature must succeed on a Wisdom saving throw or take Psychic damage equal to a roll of your Fisticuffs die plus your Constitution modifier and have Disadvantage on attack rolls it makes against creatures other than you until the start of your next turn. Once you use this feature, you must finish a Short or Long Rest before you use it again. You can also restore your use of it by expending 3 Moxie Points (no action required).

You gain the following additional Dirty Tricks. You can use one Dirty Trick each turn, and once you use a dirty trick, you can't use that trick again until you finish a Short or Long Rest.

Rabbit Punch. When you hit a creature with an Unarmed Strike or a Pugilist weapon, you strike its head. Until the end of your next turn, the creature loses Resistance to Psychic damage if it has it and has Disadvantage on saving throws.

Sucker Punch. When you hit a creature with an Unarmed Strike or Pugilist weapon, you can turn the hit into a Critical Hit. For this Critical Hit, you roll the attack's damage dice three times and add them together, instead of twice as normal.