Breaching

[Magaret]

when [having sex] and the penis [accidentally] enters the [anus].

[Luis Fok]

When your poop is so large that it breaks the [surface tension] of the water from below. (similar in concept to how a [whale] or a [submarine] “breaches” the water)

[Vania]

when an individual urinates in the butthole of another and said other person farts. Resulting in a [geyser] like [projection] of urine and [fecal matter].

[Jason Yan]

present participle of breach