The strange phenomena in which women are naturally drawn to the jama without any input from said jama.
Guy 1: Did you hear Stacey fell for jama?
Guy 2: I'm not surprised. The jama jam strikes again.
A more sexual version of a sleepover. Basically people show up in their PJ's, get stoned, and then procede to have all kinds of sexual experiences with the other guests, leading to a large orgy involving the host, all of the guests.
Guy1: Dude, Stacy's having a pajama jama jam, you going? Guy 2: Hell yeah!!!! No way I'm missing that!!!
55👍 22👎