When someone points out something that’s painfully obvious as if it were shocking information, the thing that this person mentions is commonly the entire point.

A lock of Cher's hair.

To ditch or otherwise abandon an item of property in a location where it can be found and used by others, especially while traveling.

an unduring term for a friend similar to homie or dawg
Comes from the famous detective Sherlock Holmes

Used as a sarcastic comment for someone who stated the obvious, using a reference to the famous fiction detective Sherlock Holmes, it can be understood as "No way, you are Sherlock Holmes!" which can actually mean "Of course, you dumbass!".

A phrase often used towards someone who states the obvious.

Crazy ass high functioning sociopaths that will beat you with a riding crop if you insult their fandom. Prepare to be deduced.