To tidal wave someone is to take their garbage can and dump all the trash in it on their yard and then proceed to fill the garbage can up with water, then lean it up against their front door, ring the doorbell, and hide nearby to watch the tidal wave crash into the house when they answer the door.

When your eating out a pregnant woman and her water breaks.

When you have a massive dump and the water splashes up at your arse.

A tidal wave is the fat roll that goes up the back of a woman during sexuall intercourse from behind, on some occasions it may hit them on the back of the head this is know as the ultimate tidal wave.

A feeling of intense hunger that rushes over you like all of Ethiopia condensed into a massive tidal wave.

when a woman's thong is visible over the back of her pants

When a chick is riding a fat guy's cock and his belly starts to jiggle like a wave, the girl leans forward and proceeds to ride the "wave" his belly makes.