A "Moises Moment" is a moment where you just do something so stupid you wonder how you've lived this long.
"Bro I just pulled a Moises Moment" "What happened" "I was drinking my coffee and thought it was gross so I dumped it out on the floor instead of the sink" "Fucking idiot"
1) A term that initially had positive connotations but then became derogatory, and now it is mainly used ironically and vaguely in the same way as 'cringe' is.
2) Specifically refers to the idiocy of the Reddit hivemind. Whenever a horde of redditors attack someone because they like minecraft, that's when you'll know a reddit moment happened. The term is meant to be used by someone viewing the thread from outside (e.g. someone linking the thread from a discord GC).
Example 1a: You watch vtubers? That's a reddit moment tbh Example 1b: You actually read through the entire terms of agreement? That's a reddit moment tbh
Example 2: Getting downvoted because you expressed an opinion that goes against the majority's opinion of a subreddit is a reddit moment.