A noun describing an event whereby a morbidly obese person becomes lodged in a tub. This is usually caused by air being trapped in between back fat and the porcelain tubs surface creating a suctioning effect.
It was a very dull commute home from work today: the District line was stopping every five minutes and my MP3 player ran out of power. The journey's only redeeming feature was tubestalking this beautiful tourist from Victoria to Embankment.