This is an unformal way of speaking and is very
common in the speech of children from
London.
It basically means 'Exactly' , '
For real' or 'Really?'
James: 'Nah but if you deep it,
music is actually a free lesson at this point.'
Liam: 'Word, I've been saying that, anyways, I'll catch u later g'
James: 'Alright in a bit'