blow one's load

verb2

1. •
   (slang, vulgar) To ejaculate, to cum.

   • “I want your big cock up my ass so bad, I'm jacking off, and if I don't stop soon, I'm gonna blow my load." — 2009
2. •
   (slang, vulgar) Synonym of blow one's chance.

   • He blew his load in the first round and went home early.