Cette comparaison est tirée par les cheveux = That comparison is somewhat far-fetched.
On ne peut prendre aux cheveux un homme rasé = One cannot get blood from a stone. (See Huile.)
En cheveux (of a woman) = Bareheaded.
[Of a man: tête nue.]
Les cheveux en brosse = Hair cut short (standing up like the bristles of a brush).
Prendre l'occasion aux cheveux = To take time by the forelock. (See Balle.)
Avoir mal aux cheveux (fam.) = To have a head (i.e. a head-ache in the morning after a drinking bout.)