Perms and hair removal products both contain chemicals that smell like sulfur, often described as “like rotten eggs” (my experience with rotten eggs is miniscule so I can’t confirm). Cruciferous vegetables contain sulfur, as do eggs of course. Thinking back on what you ate, remember it could be more than 24 hours ago, or it could be gas from tonight getting ahead of the poop.

Some diseases can also make poop smell different so it’s worth trying to come up with a more accurate description before searching the Internet. Also take into account how you feel in general.