follow through

verb

1. To execute or complete a commitment.

   “I don't appreciate salesmen who make promises and then fail to follow through.”

   “Try and follow through with your strategy.”

2. To continue moving the arms (and any held implements, such as a bat or club) or legs after striking e.g. a ball.
3. To defecate unintentionally as a result of a cough or sneeze, etc.

   “It looked like he'd just farted and followed through.”

   “LORNA WYNDE: You cried so hard, you followed through in Oddbins.”