A special/scary type of lapdance, typically found in underground Asian bars:
A very large Asian woman, sometimes dressed as a sumo wrestler, who gives a lapdance to a man. The dancer throws a load of fried rice on the man's lap, then begins to give him a dance, which makes a chemical reaction in the dancer's asshole and inflates the ass like a balloon.
Sometimes performed by Asian men to women
"Mark went to China and hired a sumo wrestler to give him a chinese assload, but then he realized it was just Jamie!"
"I hear a chinese assload is the best lapdance you can ever receive at that bar in Chinatown. Better than any whore by far!"
The term "ass load" can be found in the Old Testament of the Bible. God tells Noah to bring an ass's load of grain for each pair of animal brought upon the arc. Thus an ass load is derived from the amount of weight that can be held carried by a mature, healthy donkey (ass).
The term is used again in the New Testament when Jesus shares the parable of Rosie O'Donnell's booty, it is cursed to weigh over 7 ass loads because she is an annoying, fat, and ugly bitch.