When your mate repeatedly cancels on organised events which he has known about for weeks or even months with little or no notice, or good reason.
Nigel Wagner said he couldn't come to an organised 30th birthday party of a supposedly close friend who he lived with for a year, and by way of notification via a text message at 14:09 the day before the event. This is an extreme example of badmatesmanship.
Combination of badmouthing and bashing, often used by a person that studders or has mush-mouth.
The sales rep was such an annoyance as he kept badmashing us in hopes it would make us look bad. In the end, it made him look like a total douchebag, and he lost!
Anyone claiming to be, truly is not. They are more than likely insecure, carrying around a small package, and certainly a representative of the downgrade of American society.
Going one better than Wagner and cancelling at 5:55 when agreed to meet up at 6:15 witha crap text saying something along the lines of " feel grimulease, gonna give it a miss..."