what does uhm mean when texting?

its on a test im taking tomorrow and i don’t know what it means.thanks !

for aeropostale there having a sale thats up to 70% off, i dont get it like up to?

I’ve seen some of my friends posts to other people (that I’m not friends with, just them) show up on my news feed that l...

Lol i hav no clue

actually I'm studying English as second language. someone asked me that what are you into, but I couldn't understand wha...