Joe gingerly pressed the king-sized hotel mattress with his index finger, grimacing as he felt it give easily; no doubt from years of couples' hobnailing upon it.
Generally written in all capital letters, this word represents the sound of a very pleasurable ejaculation. It is often used as a one word response to representintense excitement or approval.
Guy A: "Did you see the newpreview for Clash of the Titans?"
Guy B: "HUBLUCK."