"Sup" is short for "What's up?" It is a good way to start a conversation and ask someone how their day is going. It is a very informal greeting.
Inbd mean "It's no big deal" in text language.
<*sub*>text here</*sub*> OR <*sup*>text here</*sup*> Either one will work, but remember to REMOVE THE STARS.
BTW means By The Way in text language
It is short for "What's up?"...which means "What's happening?", "What are you doing?" or "How are you?"
in text language ttfn means ta ta for now
Inbd mean "It's no big deal" in text language.
defo
Assuming you mean sup as in "what's up?", it's spelled 'sup.
RUS in text means "are you serious".
sup means whats up
who you speaking to
y=Why