slappingest 

To slap harder than any other slap before. To be so delicious that you are left dumbfounded, like you were just slapped upside the head by Lou Ferrigno in his prime.

The four-cheese pizza with crushed tomato from Big River Pizza in St Paul is the slappingest 'za in town!

slappingest by Hungry_AF July 30, 2021

Shippingest 

The person who can acquire both loads of freight, and the means to transport them (trucks, trains, planes, horses, camels etc.) better than anyone else is the shippingest.

Another load delivered. Man, Johnny is the shippingest motherfucker around.

Shippingest by Mac the truck October 4, 2011

slammingest 

The baddest, sickest thing in the world!

That's the slammingest piece of gear I've ever used.

slammingest by MolsonFL December 29, 2010