To use your iPhone / iPod whilst on the toilet or (in unfortunate circumstances) to drop said iPhone / iPod in the toilet.
Guy 1: "The line is very echoey - where are you?"
Guy 2: "I'm in the toilet, it was a long one and I got bored. Thought i'd iPlop you"
or
{Depressed voice} "I was using the bathroom and my iPhone slipped out of my pocket. I couldn't grab it and had to watch it iPlop into the toilet!"
Similar to ipoop only more expensive!
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