Usually referring to album browsing on Facebook or the likes, when you don't have the time or the inclination to look at every photo in the album - instead you graze through the thumbnails and pick the ones you want to see closer.
Oh yeah I was thumb grazing through Johnny's Christmas album on Facebook and found three photo's with me in it.
by Tealla January 3, 2009
Get the Thumb Grazingmug. What Scott’s do when they may or may not slice there jugular shooting some not so slapping slap rounds
by Potatochipz101 May 20, 2021
Get the kentucky thumbmug. When you are eating a girls pussy out and she is on her back and you lying on stomach usually, with your face in her pussy you wrap your arms up and around her legs from the outside to the inside and while eating her box you spread her pussy lips with index and forefinger, while inserting thumb#1 in upper pussy and thumb#2 in main pussy hole area, cxonstantly working and rubbing and thrusting into her until mayonnaise is pouring out on your face and you smile while she shakes and moans. Great job Casey B. from Idaho, you can eat some box real good..mmmmm
Casey was double thumbing a girl he met at the gym on his kitchen table when his old lady walked in and busted him with both thumbs and his tongue in her little pink pussy. Casey was in Big Trouble Mister, BIG TROUBLE, but the slut got double thumbed so she was good.
by kcgreen December 1, 2016
Get the double thumbingmug. 
by Kung flue July 19, 2020
Get the Thumb strummug. by Trigger3866 May 20, 2021
Get the Kentucky Thumbmug. The acceleration of typing speed but deceleration of the accuracy in the words , content and context while texting due to thumbs fatigue although thought flows are exponentially high. Also known as FBST syndrome.
I was texting this girl come over to my room but instead I got hit with Fast Brain Slow Thumb syndrome and wrote “Come Over my hoes” so I blew my chances.
by Sassy Sheesh November 24, 2021
Get the Fast Brain Slow Thumb Syndromemug.