Van Dyke

A picture of a penis, known colloquially as a "dick pic"
It's most sarcastic use is of sending a publicity still of the actor Dick Van Dyke to a friend - you did indeed send a picture of a Dick. However, this can be best used when moaning to a friend (in polite society) when you have become the unwilling recipient of a picture of an actual penis.

Two minutes of chatting with this guy online, and he send me a Van Dyke...