expulsive

adjective

ex·​pul·​sive ik-ˈspəl-siv 

1

: serving to expel

expulsive efforts during labor

2

: characterized by concern with the elimination of feces

there are two anal phases—the earlier expulsive and the later retentive

—G. S. Blum

expulsion

-ˈspəl-shən 

noun