drop in

Verb

 * 1)  To arrive casually and unannounced, with little or no warning; also, to visit without an appointment.
 * 2)  To paddle into and take off on a wave another surfer is already riding.
 * 3)  To fall in; to cave in.
 * 4)  To install components, particularly car engines.
 * 1)  To paddle into and take off on a wave another surfer is already riding.
 * 2)  To fall in; to cave in.
 * 3)  To install components, particularly car engines.
 * 1)  To paddle into and take off on a wave another surfer is already riding.
 * 2)  To fall in; to cave in.
 * 3)  To install components, particularly car engines.
 * 1)  To fall in; to cave in.
 * 2)  To install components, particularly car engines.
 * 1)  To install components, particularly car engines.