A shambam is the product of dating ambiguity. When a man believes he's in a relationship with a woman, but has not yet consummated said relationship by rounding second base, then a shambam
may occur. Typically, a shambam
will involve a club night, where the man
will accompany the woman to a venue believing they
will leave together. But the woman, believing herself to be unattached, hooks up with another guy and spends the night with him. For our unlucky bachelor, a shambam has occurred.
Mark
hooked up with Iris? But I thought she was with Jordan? I guess it was just a shambam.
You
mean she slept with Dan? But she went out with Adam last
night. I guess she really shambammed him.