Big L means, big loss or big loser, it's normally used by beautiful kids and it is also very famous in 2019
Me: My family got murdered yesterday
The Autistic Friend: HAHAHAHAHAHAH BIG L
13👍 2👎
Big L is when someone does something weird or when something bad happens to someone
Me: My cat just died
My Ugly Friend: Hahahahahah Big L
2👍 4👎