outfall

Short definition from Wiktionary

Verb

1. 1
   To burst forth, as upon an enemy; make a sally.

Noun

1. 1
   A sudden eruption of troops from a fortified place; sally.
2. 2
   A quarrel; a falling out.
3. 3
   The point or place of discharge of a river, drain, culvert, sewer, etc.; mouth; embouchure.