Definition of lurches:
(n) :
A sudden or unsteady movement.
(v) :
To make such a sudden, unsteady movement.
(n) :
A predicament or difficult situation.
(v) :
(dialectal, intransitive) To evade by stooping; to lurk; lie in wait; go about in a sneaking way.
(v) :
(dialectal, intransitive) To take by surprise; to unexpectedly detain.
(n) :
(dialectal) A lift or heave.