Eugh, you're such a shower.

Me: What a douchebag.

Dee: What does that actually mean?

Me: Well, it's like a dick, isn't it? Let me google it.

Here is what wikipedia informed me:

Douche usually refers to vaginal irrigation, the rinsing of the vagina, but it can also refer to the rinsing of any body cavity. A douche bagis a piece of equipment for douching—a bag for holding the fluid used in douching. To avoid transferring intestinal bacteria into the vagina, the same bag must not be used for an enema and a vaginal douche.

Cheerful stuff, I hear you cry. It goes on to explain that:

Slang uses

Douchebag, or simply douche, is considered to be a pejorative term. The slang usage of the term originated in the 1960s.^[5] The term usually refers to a person, usually male, with a variety of negative qualities, specifically arrogance and engaging in obnoxious and/or irritating actions, most often without malicious intent.

This, I read out with gusto. And, as my father agreed, it was 'suitably edifying'. We had a good lol at 'a variety of negative qualities'. Gotta love Wikipedia's wording.

So now you know, as I know, that being a Douchebag is quite similar to being a dick in its use, and therefore, to avoid the awkwardness of ever discussing this again, I declare 'like a dick, isn't it?' to be the official definition.