Scrote was a term used in 2015, derived from the word "scrotum", that replaced a derogatory use of the word "balls".
It was used by Leslie "Spike" O'Malley, the sole female member of Griff's gang, when they approached Marty McFly, Jr. in the Cafe 80's and asked if he would join them on their robbery of the Hill Valley Payroll Substation.
When Marty Jr. said it could be dangerous, indicating that he had no fortitude to go along with Griff's proposal of "tonight's opportunity", Spike placed her hand( which had two blade rings, one on her pointing finger and one on her ring finger) she then placed it on his cheek and started to to lower her hand down to his private area. During this, she asked "What's wrong, McFly? You got no scrote?", before proceeding to grab Marty Jr. in that very personal place(!), lifting him up off the floor.