Apparently mackem way of spelling 'howay' (Geordie). north east term meaning 'come on'. never in my life have i heard it as a greeting. probably the most common word used in football grounds in the north east, aswell as 'shite'.

/'ha wa/ Used by 'mackems' or people originating from the Sunderland area (North East England), similar meaning and use to the geordie 'howay'. Meaning 'come on' can be used either in the sense of travelling somewhere, or more commonly used at football matches as an expression to get your team to perform harder.

Come On as in "Haway The Lads"

the jordy way of saying hello