This word is used primarily by females who have formed initial sexual relations with males and have been apart from the stimulation both physical and emotional for a short period of time. The stimuli derived from anticipation of the hoped for sexual gratification upon uniting is the "jakattack".
Debbie's furtive probing eyes toward the cafe door bespoke of the wetness that dampened her snug, teasing panty. "God I hope Enrico gets here before I have another jakattack" she muttered under her breath all the while creating images of her spreading wide for the awaited penetration. see jackman
for origins and references