Definitions by ChUcKa-

helmet head 

a head that is surrounded by a shit trim in the shape of a helmet. this person would most likely be able to take a serious knock to the head without injury.

far out, look at sainty's helmet head.

helmet head by ChUcKa- March 28, 2021

default lid 

a trim that is so unnoticeable and would never turn, let alone gain the attention of the opposite sex.

geez, look a blake hanlon's default lid.

default lid by ChUcKa- March 28, 2021