trailer park beauty pageant 

contest or situation where the standards or measuring stick is very low.

sub par excellence.

Ex 1:
Bill: That chick you took home last night was pretty ugly.
Bob: Yeah but she could've won a trailer park beauty pageant.

Ex 2:
Son: I scored 4 Touchdowns today, Dad.
Father: Yeah but you ain't exactly playing a very good team, it's like winning a trailer park beauty pageant.

trailer park beauty pageant by Alan W. Chan January 9, 2009