Squirt

The Squirt is a medium-sized poop enemy that does contact damage to Isaac by periodically dashing to him. Two Squirts spawn from Dingas when killed. It splits into two Dips when killed.

Dank Squirt
Dank Squirts dash towards Isaac, leaving a trail of slowing Black Creep. Upon death, they spawn two Clots.

Splurt
Splurts are a variant of Squirts that dash twice towards Isaac rather than just once and can travel over flooded pits. Upon death, they spawn two Drips.

Hardy
Hardies are a rocky variant of Squirts.

They charge at Isaac, and if they run into an obstacle/wall, a piece of them breaks off and rock projectiles are fired outwards. After running into rocks/walls three times, a Hardy will die. Upon death, it spawns a Dip.
 * First collision: 8 rock projectiles are fired out in a radius.
 * Second collision: 8 rock projectiles are fired out in a radius and a cluster of rock projectiles is launched in Isaac's direction.
 * Third collision: A cluster of small and large rock projectiles is launched in Isaac's direction. The small rock projectiles have shorter range and will spawn 2-3 Rock Spiders and the large rock projectiles each shoot out a small cross of 4 smaller rock projectiles upon landing.

Trivia

 * Squirts are likely a reference to Zols, big Gels that split into two Gels upon death.