- upvote context
- Upvoted in comments that cleverly use the ruler as a metaphor for measuring up or calling something straight/narrow.
- community use
- Popular in r/LGBT for ironic 'straight' jokes, r/architecture, r/engineering, and r/mildlyinfuriating for rigid people.
- subreddit meaning
- In r/memes and r/teenagers it signals someone boring or uptight; in technical subreddits it's used literally.
- karma context
- Karma-farming comments in design or architecture subs often include ruler emoji for authenticity.