Originated on AR15.com when a member (Shawnofthedead) was invited to a threesome that included a male and female and started a thread. He, in haste and against the advice of many members, said "fuck it im foing" and was never heard from since.
An obvious typo has now transformed the word "going" to "foing" on the ARFCOM boards.
sgtar15 - Check out my dolls SteyrAUG
SteyrAUG- Fuck that, im foing to clean my whitetiles.
"Fours" is the name used to refer to a certain type of rim (hubcap), made of wire, in 1984 (where the "four" comes from). They have a fairly distinctive shape, sticking out from the wheel.
The rims are now extremely expensive and rare, having been discontinued. This type of rim is especially popular in Houston.
The term fo' fo's was popularized in the song Still Tippin by Mike Jones Feat. Slim Thug and Paul Wall. Tippin means to cruise from side to side in your car, so if you're tippin on fo' fo's, you're cruising around on your really expensive, rare wire rims.