a drink resembling a brown sludge consisting of Advocat, Southen Comfort and coke, best served on the rocks
by Jonathan Boothby February 5, 2008

Some dietary supplement tend to make the taker excrete their own body fat in liquid form (Britney Spears was rumoured to be a fan). However, unlike spears these fluids can be used for the sole purpose of lubrication of the rectum. Perfroming a Sloppy Jack would be to take advantage of these fluids in the pursuit of back door pleasures
by ManMachine January 24, 2005

by Mallory December 19, 2004

The physical act of when your Jack Russell Terrier is running around like a spaz farting and shitting while she's running. This act, while very comical can cause shit to fly every where including but not limited to carpet, doors, ceilings and some household appliances.
I have to get off the phone, Molly just "Jack Sharted" all over the place and I need to contact Molly Maid ASAP!
by Tracyusa August 18, 2010

by Werdswirth Sayen February 1, 2018

when someone objects to your membership of facebook, myspace, twitter, etc. but then hops on your account when you are not expecting it.
My husband hates it when I am on facebook, but I caught him cyber-jacking my account to look up old high school friends.
by Dignme1 March 9, 2009

when lying naked on ones bed and jumping on to your stomach then to your back resembling flipping a flapjack
by MC triple T January 3, 2011
