The resulting mess of a premature ejaculation in your pants due to the stimulus of any female interaction including conversation, sexting, fantasizing, or direct casual contact (sexual or non-sexual).
"I was thinking about Sally a little too much and brewed a warm corn bag at work."
Jim was grinding on Courtney on the dance floor and he blew a warm corn bag on the third song!
I was talking with Lisa about spanking her for her birthday and just about had a warm corn bag.
Jenny looked so hot today! I just about made a warm corn bag when she bent over to pick up that paper.