" button-down "

 [ "button-down" ]

1: conservative, conventional, etc.

  * e.g.,  ... a button-down mind 

 [ "Sit down button" ]

1: That bit just between the butt and the top of the back of the thigh, where if you kind of tickle it a little bit the person has to reflexively and involuntarily sit down.

  * e.g.,  ... (Falls over a bit) "Hey! That was my sit down button!" 

 [ "Button Down Shirt Energy" ]

1: Not quite as bad as "small dick energy," but sort of a middle ground. No swag, harmless, forgetable, sexually invisible, insecure men who wear button down shirts as general fashion have this kind of "energy." Sort of a beta male.

  * e.g.,  ... Susie: "I'm going on a date with Thad tonight." 

 [ "down button downer" ]

1: (negative) a person who frequently uses the down arrow button on their keyboard.

  * e.g.,  ... Person A: *presses down button 17 times within the span of 3 seconds*