"Drop in, drop out" usually refers to online video game playing where any player wishing to join the game in progress can "drop in" and assume instant control of a NPC (computer controlled player), without any significant disruption to the gameplay. The player can also leave and return control of the character to the computer - "drop out" again without causing disruption to the game.
Gears of War offers drop in, drop out gameplay where any player can assume control of Dominic Santiago, Marcus Fenix's best friend, without freezing or restarting the level. World of Warcraft also offers this feature.
by tucsondude January 6, 2008

by t-hazeee January 2, 2010

when u run up behind some1 and drop their trousers in public, usually to cause embarassment or just 2 look lyk an ardnut in front of ur boiz.
rudeboi 1: Yeah bruvting i dropped that tramp and he'd shat hes pants...yeah blud init
rudeboi 2: ur mum
rudeboi 2: ur mum
by wudeboi November 7, 2007

The doling out of those that have screwed up big; i.e. dropping the ball on something. The opposite of props.
by BTLS Fan September 28, 2005

To ride any vehicle (Bike, skateboard) off any vertical or near veritical cliff with the intention of landing smoothly on a transition.
by Bite it you scum June 20, 2005

by sLiK May 13, 2005

A fancy car upgraded with expensive accessories such as big rims, gold/chrome trimming, TV's inside, game systems etc. The word "drop" is often used in modern rap songs (as of 2005).
by Pronoun April 20, 2007
