noun
The body from the waist to the knees when sitting
knees, legs, thighs, front, seat.
The portion that overlaps
extension, overlap, fold; see flap, overhang.
Part of a race
circuit, round, loop; see distance 3, race 3.
drop into someone's lap
transfer responsibility, shift blame, pass the buck*; see give 1.
in the lap of luxury
in the lap of the gods