Abbreviation for Khade Lund Pe Dhoka. Literally translates as "ditch on the erect dick". It comes from a scenario wherein the man is disallowed sex after he has, in the hope of having good sex, got an erection . It is primarily used to attribute it to a male who failed in his endeavour especially with a female. The failure could be at any level or any form. A failure, may be due to external factors, is still a KLPD. KLPD is also used to describe a state of "hopes crushed", especially in matters of love.
Its a limited belief that "Everyone gets a KLPD at least once". The statement deserved high credibility considering the popularity if the belief that "Everyone falls in love"