What's your screen name mean?

[jst8a5.0]

When I was 18 I built up a 1974 Pontiac Ventura sleeper of the century with aluminum headed 400. 5.0 Fox body mustangs were a dime a dozen (ricers at the time always swerving in and out of traffic) and I would walk all over them. Never lost to one 5.0 so I put it on the license plate "jst8a5.0" (just ate a 5.0) just to taunt them and it stuck.