dropped the jack 

to make an outing or social gathering much less enjoyable due to neglecting important details

bobby forgot to make reservations for the party, now we have to hang at my stupid apartment. he really dropped the jack on this one

dropped the jack by dr_awkward_17 December 1, 2010

The American Jack-O-Lantern 

On the night of All Hallows Eve, the male proceeds to thrust a carved pumpkin onto his partners, male or female, head while participating in the act of sexual intercourse. While the male performs these tasks he must yell out "Trick or Treat."

I can't wait for halloween this year, Pat promised to give me The American Jack-O-Lantern.

The American Jack-O-Lantern by 4B16 April 28, 2011

Shotgun Hi-jack 

When someone has previously called shotgun, and then gets out of the car at all, without calling seat-back. The person who wishes to obtain the position of shotgun shouts "shotgun hi-jack" and takes the shotgun position.

Joe's homey get's out of the car... like a fool he doesn't call seat back... Joe being the genius he is calls shotgun hi-jack and takes the shotgun position. Joe's homey returns to the car... and realizes he is a fool and sits in a non-shotgun position.

Shotgun Hi-jack by jhirbour November 13, 2011

to knife-jack 

( named after Jack the Ripper : to take hostage, kidnap, threaten, rape, or sodomize someone at knife point

Nobody knows to this day if Jack the RIpper tried to knife-jack his victims or if he used more subtle forms of psychological manipulation to get them into his hostel room before killing them.

to knife-jack by Uncle Dimma May 27, 2013

Pulling a Jack Twist

Unofficial term for that special moment in yaoi fanfiction when the uke is magically able to take everything the seme gives 'em, no lube required. Inspired by the movie Brokeback Mountain.

"Hey did you read that hot new Gerita fanfiction that came out?"
"Yeah dude! Italy totally was pulling a jack twist in that one!"

Pulling a Jack Twist by MotherPrussia September 20, 2013

The Captain Jack Sparrow 

Much like "The Houddini", during intercourse the male should spit on her back to create the impression of him being "finished", then when she turns round he spunks in her eye. From this, he should then kick her like as to ensure that she is covering one eye whilst simultaneously hopping and yelling "aaargh", much like a pirate.

She well got The Captain Jack Sparrow last night.
She cried

The Captain Jack Sparrow by Steve the Pirate 999 April 17, 2014

to knife-jack 

( named after Jack the Ripper : to take hostage, kidnap, threaten, rape, or sodomize someone at knife point

Nobody knows to this day if Jack the RIpper tried to knife-jack his victims or if he used more subtle forms of psychological manipulation on them before killing them.

to knife-jack by Uncle Dimma December 8, 2014