[quote name='Fionn' timestamp='1468876677' post='3094033']
I know it's going to be tempting to tell me that it's the past-tense of stink. Don't, it's too obvious.
[/quote]
I think it means gross, disgusting or creepy.
However, young master discreet (14) often greets me with 'what up, stank' first thing in the morning, when I'm not quite ready for it.