Lego Face 

The same look of extreme pain and anger on one's face as though they just accidentally stepped on a lego.

I know dad was pissed about the car he had his lego face on.

Lego Face by Partsguru13 June 3, 2017

Face like a tub of fire-damaged Lego

A person so exceptionally ugly that you want to be sick when you see them

“oh my god Walsh! That skank you pulled last night was so messed up, she had a face like a tub of Fire damaged lego. Sick b*tch”

Face like a tub of fire-damaged Lego by Hai Sundera January 28, 2005

Face like a bucket of burnt Lego 

someone who is a bit of a Minger, or Munter.

Jocelyn Wildenstein has a face like a bucket of burnt Lego

Face like a bucket of burnt Lego by tuna luna August 11, 2006