Glassin'

[Luis Fok]

Means to look at something intently. This is a hunting reference when youre staring at things with binoculars. Originally went viral when hunter Fred [Eichler] shot a moose with an arrow and it dropped in under 20 seconds.
Youtube- just glassin
And then popularized by Tom [Segura] and Christina P in their Your Moms House Podcast where they got listeners to use glassin in common language, particularly when looking at drivethru menus. Tom Segura explains it [on the Joe] Rogan Experience which can be found on YouTube by searching, just glassin