To expel all of one's bodily fluids simultaneously. I.E. urinate, defecate, bleed, vomit, ejaculate, cry and blow your nose simultaneously.
"I'll have avalanched potatoes with a light murph, please."
"I asked her to marry me and she straight up murphed."
"Amidst the cherry trees, a romance blossomed. The myriad nooks and crannies of the bark were supple in the wake of their love's first murph."
"My name is Ben Fossit, and I am addicted to murph."
"Tom wishes he could murph on a hot Albanian chick."