To do something brilliant, but have no-one around to see it. So therefore null and void.
I can't believe it, I did 2.6 million kick-ups with that flat rugby ball, however it was Gwagg.
I ran the 100 metres in 6.7 seconds, but it was Gwagg.
Gwaggin' hell! I just got 7 hole in ones in one round of golf, but as per usual its twattin' Gwagg!