The profound sense of shame that accompanies an ejaculation during
intercourse with a partner whom the ejaculater knows he or she does not
respect or wish to be involved with for a long time, despite said partner's false perception that the relationship extends beyond
intercourse; to cum with shame.
She was so shallow, vain, and
dumb, but so busty that I couldn't
help but let myself shum into her foul mouth.
I shummed on her tits.
I spent all night shumming on her stupid ass.
I
shot my shum on those pearly whites; that shumming last night drained my balls and filled my conscience with shame - gave me a set of shamesticles.