Two knuckles deep refers to somebody who is digging for nose boogers while face to face with someone or a group of people, not hiding the event, letting everybody see the activity.
Victoria: Did you see that?!? Chad just went two knuckles deep!
Steve: Two knuckles deep?
Victoria: Yeah! He was digging for nose boogers right in front of us!
Steve: Two knuckles deep?
Victoria: Yeah! He was digging for nose boogers right in front of us!
by DeeQue November 8, 2014
Get the two knuckles deepmug. To finger fuck a girl, using several fingers at the same time. Usually implying the girl is very arroused.
by FA Double D December 25, 2008
Get the 3 knuckles deep stirring the soupmug. by Not_worth_it June 12, 2020
Get the Sixth knuckle deepmug.