Pachycephali

A (consensual) fight in which the two to three participants run into each other head first until someone gives up. Normally done for a small sum of money on a flat field.

"Hey bro, wanna Pachycephali tonight for a hundred bucks?"
"Yeah bro."

by n0t_dutch June 28, 2022

Pachycephalosaurus

the act of head butting a chick in the mouth during sex

# 2 : i was with this guy last night - he called me a freak and gave me a Pachycephalosaurus . busted my lip right open.

# 1 : not cool man , not cool.

by islamorada in 2:45 minutes December 24, 2010

Pachycephalosaurus

An ornithischian dinosaur from the Late Cretaceous period (70-66 million years ago) known for it's domed skull. Additionally the largest member of the family Pachycephalosauridae.

"The dinosaur Pachycephalosaurus is thought to have used it's domed head in combat with other members of it's species."

by ankylosaurusfangirl January 14, 2024