it's recent? didnt know that. I just asked a few co-workers and they had no clue either. Maybe we too old?
IMO this slur is confusing and I really don't know what to think about it. If I heard someone say it, I wouldnt assume they were racists. Everyone I know hate Mondays because its the first day of the week and you got 4 more left. Just this monday I looked at my co-worker with my droopy eyes and said, "I hate Monday's" to which she replied, "Everyone hates Mondays, find me someone who does like them." We were actually talking about Monday!