It's not a stupid question just off-topic
When you run into something like that, simply google "Internet abbreviation TTL or IDK .... or whatever... and you will find the answer
TTL means Talk To You Later
IDK - I Don't Know
BFF - Best Friends Forever
and, btw, IDK and I mean it - I really don't know who uses those! Cause I think its a bit too much.. one day an internet convo will look like this:
YAM WB BFF ITG DSU...![]()