Shark Thumb.
The sexual act of placing you little finger (pinky) inside your partners anus (butt), while keeping all other fingers tucked in except the thumb that will stand proud and looks like a shark fin just slightly cresting the bottom of your partners posterior (butt) as they lay on their front.
The sexual act of placing you little finger (pinky) inside your partners anus (butt), while keeping all other fingers tucked in except the thumb that will stand proud and looks like a shark fin just slightly cresting the bottom of your partners posterior (butt) as they lay on their front.
During foreplay Sam Shark Thumb'ed meredith last night, meredith giggled as she looked over her shoulder and saw the shark fin (Sam's thumb).
by Samqwell December 30, 2019
Get the shark thumbmug. by -/:;()$&@“ November 14, 2017
Get the bear thumbmug. by Nutsack93 October 12, 2023
Get the Thumb swoopmug. A person that idly scrolls through social media on a mobile device, often without even paying attention to the content. In extreme cases hours can be lost in this state. Interaction of any kind is impossible, one must wait for either a wifi drop out or battery low warning before engaging.
by Jcerrino December 23, 2016
Get the thumb zombiemug. While popularly used as the term for approval (thumb's down for disapproval ) Not many know that in rap or in Fighting word's thumb's up means safety off due to the motion of taking the safety off is putting your thumb's up.
by AllFatherOfFighting October 21, 2018
Get the Thumb's upmug. The lack of exercise caused by being on a portable game device or smart phone for extended periods of time. Typically Apple or Blackberry users
by Cyberwulf July 18, 2012
Get the thumb exercisesmug. Book thumb is from holding open a book with your thumb and index finger for long periods of time, causing pain in your thumb muscle.
by blueberrypancak September 2, 2013
Get the Book Thumbmug.