Attack speed: how many basic attacks per second. The stat marksmen and on-hit champions stack.
team chat
what you type
he has 2 5 attack speed dont fight him
in full english
He has 2.5 attack speed, don't fight him.
the context
The short form "as" exists but the decoder does not link it: "as" is also the plain english word in "group as 5". In chat the full word is more common.