Gleam Gleam

It is like the f-word in can be used to mean almost anything and shouldn't be tied down to one definition. For general context probably a phrase used in substitute of an object or honestly anything.

Oh... So you messing with that gleam gleam

Hol-ly you been out there smackin people with that gleam gleam

Bro you got a new hair cut, looking like a good gleam gleam