A simplified way to describe a fast-declining mental/emotional state, often leading to short-term bouts of depression or anxiety.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

A situation or action that is totally stupid, out of control; should not have been done in the first place.

When brunch turns into an all day drinking bender that ends up lasting until the wee hours of the morning.

The sexual act of rotating on the dick in a fluid motion, without interrupting penetration , resembling that of a gymnast. Toes pointed. Abs tight. Perfect finish.