haamushhnaagaa
The loud, confused noise you make when you can't remember someone's name and just give up and yell something stupid.
'Haamushhnaagaa!' *covers face* 'I didn't mean to yell at my friend.'
'Haamushhnaagaa!' *laughs* 'That was my brain giving up.'
'Haamushhnaagaa!' *points at friend* 'That was not your name, that was my failure.'