RYC

When someone begins a reply with RYC, it typically means "regarding your comment." You're most likely to encounter this acronym during chat or forum discussions, when a user is commenting on a previous message.

For example, if you post a lengthy discussion of why putting pineapple on a pizza is the absolute worst, another user may reply "RYC, pineapple is actually one of my fave pizza toppings." That user has terrible taste, but at least they took the time to read and reply to your message.