drop-in

Adjective

 * 1) Provided for short-term use.
 * 2)  Fit to substitute for some element in a complex system without changes to the existing infrastructure.
 * 3)  Allowing people to drop in; that is, to visit casually, without an appointment.
 * 1)  Allowing people to drop in; that is, to visit casually, without an appointment.
 * 1)  Allowing people to drop in; that is, to visit casually, without an appointment.

Noun

 * 1) One who casually drops in (visits unannounced or without appointment).
 * 2) An informal event that does not require booking in advance.
 * 3) A place that can be visited casually, without an appointment.
 * 4)  The act of dropping in; that is, taking a wave that another surfer is already riding.
 * 1) A place that can be visited casually, without an appointment.
 * 2)  The act of dropping in; that is, taking a wave that another surfer is already riding.
 * 1)  The act of dropping in; that is, taking a wave that another surfer is already riding.
 * 1)  The act of dropping in; that is, taking a wave that another surfer is already riding.