1. To slow or inhibit forward movement or progress to the point of stagnation and ultimately, death.
2. The act of drawing someone's attention away from something, or to deflect.
3. The polar opposite of helpful.
A Scots word used to mean that you are world weary, down-trodden, and thoroughly bereft of any lust for life when these words and expressions are simply too inadequate to signify the magnitude of your slide into "shitdom".
"Having to pay550 euros to the locksmith on an emergency call out really scunnered him."