haamushhnaagaa
When you forget someone's name and just yell out a stupid noise like you're trying to be funny and it backfires.
'Haamushhnaagaa!' *laughs* 'That was my brain being mean.'
'Haamushhnaagaa!' *points at self* 'That was me being silly.'
'Haamushhnaagaa!' *facepalms* 'That was my brain being a jerk.'