A Cumquick cums too quickly a/k/a a two pump chump, two stroke donkey, quick draw mcgraw, premature ejaculator.
One Girl to Another: He may be cuuuuuute, but he's a cumquick.
Another: NFW (no f*cking way)
Girl: Tested it and it came in under 2 minutes
Another: What a two pump chump! He needs to stop trying to get laid and stick to jerking off.