blow one's wad

verb3

1. •
   To spend all of one's money.
2. •
   To expend all of one's resources or efforts; to express all the arguments or ideas which one has.
3. •
   (vulgar) To ejaculate, to cum.

   • There's a cock ring he keeps stretched around a hairbrush; he rolls it off and slides it down into place against the base of his shaft, to help him stay hard without blowing his wad. — 2009