For Ninja Prawn:

The Sarcasm Domain for Clerics

Gods of Sarcasm, such as Louis CK, Joan Rivers, and John Fugelsang, view mocking of those who need it as one the primary ways civilization advances and ignorance is banished.

Sarcasm Domain Spells

Cleric Level Spells
1 Charm Person, Tasha's Hideous Laughter
3 Detect Thoughts, Silence
5 Bestow Curse, Tongues
7 Banishment, Confusion
9 Dream, Scrying

Voice of the Scoffer
At level 1, you learn the Vicious Mockery cantrip.

Armor proficiency
Also at level 1, you gain proficiency in heavy armor, as you are going to be making a lot of people quite angry.

Channel Divinity: Self Loathing
Starting at second level you can use your Channel Divinity to make someone feel truly wretched. As an action, you present your holy symbol and shout insults at a creature you can perceive. The target must be able to hear you (although you need not shout the insults in a language it knows) and cannot be immune to charm. Until the target makes a Charisma saving throw against a DC equal to your spell save DC, it has disadvantage on all saving throws, skill checks, and attack rolls. Once the target makes its save, it will be furiously angry with you for a length of time equal to the time it spent in self-loathing. It is up to the DM how the creature responds to this anger, but attempting to hurt you a lot is not an unlikely response.

Channel Divinity: Taunting
Starting at sixth level you can use your Channel Divinity to make someone angry enough at you to want to rip your lungs out. As a bonus action, you select a creature you can perceive within 10' of you. For a period of one minute each time it is your turn you may utter a brief insult. The target will have disadvantage on any melee attacks it makes that do not include you as a target, but only so long as you insult it on your turn and it can hear the insult. The insult does not need to be spoken in a language understood by the target.

Mocking Strike
At eighth level your deity gives you the ability to humiliate your foes. Once on any of your turns when you score a hit with a weapon, you can also knock the target prone. This does not work on targets more than one size category larger than you are.

Improved Insult
At level 17, you may extend the effect of your Self Loathing or Taunting uses of Channel Divinity to affect a number of creatures equal to your Wisdom modifier.