Knuckledeep
Pertaining to a situation when you are hot and heavy with a significant other and your fingers are "Knuckledeep" in their anal or vaginal opening
She was laid out on the bed and i was knuckledeep in her vagina when her sister walked in.
Knuckledeep
To walk around with your hands in your pants ( typically accompanied by a disability & a strong odor )
" I don't want baylor touchin' my food .motherfucker smelling like a knuckledeep "