The document defines two idioms: "Birds of a feather" which means people with similar interests or characteristics tend to associate with each other, and "As mad as a hatter" which refers to someone who acts in a meaningless or foolish way, likened to how a "mad hatter" may act. Both idioms are explained in 1-2 concise sentences providing the key meaning behind each expression.

1. YUREILI LIZETH OROZCO MAHECHA
11-2 JM
INSTITUCION EDUCATIVA MUNICIPAL
NACIONAL

2. 
BIRDS OF FEATHER

3. 
 MEANING : PEOPLE WHO HAVE SIMILAR INTERESTS,
IDEAS, OR CHARACTERISTICS TEND TO SEEK OUT
AND/OR ASSOCIATE WITH ONE ANOTHER.

4. 
AS MAD AS A HATTER

5.  MEANING : IF YOU DO MEANINGLESS THINGS AND
LIKE TO FOOL AROUND, THEN YOU ARE "CRAZIER THAN A
GOAT", WHICH IN ENGLISH WE USE IT AS MAD HATTER.