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Yell of frustration generated by males due to an inability to generate an erection or to please their female partners. Said to have origins in North Atlanta perversion of the word slong. Can also refer to a cry of frustration generated by the female from an inadequete partner.
What was that noise?

Sounded like a jlong yell.

I feel sorry for that guys partner.
by kamerooroo April 15, 2010
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