Heel Strike
Contact made near the shaft end of the clubface instead of the center, a milder cousin of a shank.
Tends to produce a weak shot that leaks toward the right, via fade spin from gear effect.
See the related guide: Center contact
A full explanation, in plain language.
More contact & strike terms
Fat Shot (Chunk)
The club strikes the ground before the ball, losing speed and distance.
Thin Shot (Skulled)
Contact happens too high on the ball, sending it low and hot with no height.
Shank
The ball contacts the hosel instead of the clubface and shoots hard sideways.
Toe Strike
Contact made toward the far end of the clubface (away from the shaft) instead of the center.
Sweet Spot
The small area on the clubface (roughly the center) that produces the most efficient, powerful contact.
Pured (Flush)
Slang for a shot struck perfectly out of the center of the clubface, it usually feels like almost nothing in the hands.