The name probably comes from the word "faux," which means fake in French. A fake mohawk - sides are not shaved. The fohawk appears like a mohawk when it is spiked with hair gel, but because the hair on the side of your head is longer, a person can wear it down as well.
David Beckham had a fohawk.
Fohawks are cheezy, just look at the mohawk in the 80's.