dropped a head 

When someone is dating another when they could do way better.

Hey Sarah you dropped a head
Sarah- he's not that bad

dropped a head by 56sul June 16, 2017

Dropped a bucket on his head 

When someone beats you badly in some sort of game, sport, etc. you say this

Score:
Josh:21
Hyfer:2

Josh dropped a bucket on Hyfer’s head in 2K

Josh: “I dropped a bucket on his head”

Dropped a bucket on his head by BucketDrop May 28, 2018

dropped a bucket on his head 

When somebody embarrasses you by beating you in a sport, game, etc...

Can be also said as, he "dropped a bucket on my head"

*Trucks someone in madden* I just "dropped a bucket on his head."

dropped a bucket on his head by Joeys Cheesesteak April 18, 2018

head like a dropped pie 

Australian slang for an unattractive face.

A pie dropped on the ground is an unattractive mess. As is an ugly face.

Bloke 1: Check out the tits on that chick!!! Sonya!
Bloke 2: Yeah, but she's got a head like a dropped pie. I wouldn't fuck her with your dick.

head like a dropped pie by Thurston_Howell January 5, 2018