The act of penetrating ones anus with your penis but swiftly switching it to your full fist therefore going from little to big in her/his anus
"Dude I gave Ms Anderson the lil big fist yesterday she still thinks im packing"
The force of physics enacted upon ones arm after fist pumping for an extended period of time that causes one to continue fist pumping for a long period of time after. Can last anywhere from hours to days depending on the severity of the fist pump.
Artur: Why are you still fist pumping, its been days since that party ended.
Joe: Can't bro, I've got fist pump momentum.
To put your hand in a fist and punch someone (or something) so hard it ends up looking like a biscuit
To punch something so hard that your hand feels like a biscuit afterwards
If she says one more thing about me, I'll biscuit fist her so hard.
I got mad once and biscuit fisted my wall.... there's a major hole in it now.
After I biscuit fisted John, his face was so messed up he had to go to the hospital.
A biscuit fist is when you take your fist like a club and punch the temple area of someones head.
Joe biscuit fisted Steve after they got into a fight.
Shark fisting is the act of placing your two fists together and sticking your thumbs up in the air while you fist your significant other. (Best effects achieved while other is on period.)
Betty; I heard shark fisting can feel really good.
John; I can shark fist ya right now baby.
The insertion of the fist into a man's urethra
It is my boyfriend's birthday, so I'm giving him a French Fist tonight