This article is from the Recreational Figure Skating FAQ, by Karen Bryden with numerous contributions by others.
A mohawk is a turn done on the arc of a circle with a change of foot
but no change of edge. Outside mohawks begin on an outside edge and
end on the outside edge of the opposite foot (eg. RFO to LBO). Inside
mohawks begin on an inside edge and end on the inside edge of the
oposite foot (eg. RFI to LBI). On inside mohawks, the skater is facing
toward the center of the circle. On outside mohawks, the skater is
facing towards the outside of the circle.