Tú eres/usted es loco/a = you are (informal, singular/formal, singular) crazy (male/female) by nature.
Tu estas/ustedes estan locos = you are (informal plural/formal, plural) are crazy (at the moment)
(Above answer is incorrect.)
las personas son locas = people/persons are mad.
la gente es loca = folk/people are mad.
It all depends on who was crazy. Since you said, "were", I'm guessing the sentence's subject would not be "I", "he", "she", or "it". All the possible answers would be subject + conjegation of the verb, ser (past imperfect tense), + loco (loca if the subject is female).
You (informal) were crazy = "Tú eras loco(a)."
You (plural) were crazy= "Vosotros erais locos(as)."
They were crazy = "Ellos eran locos(as)."
We were crazy = "Nosotros éramos locos(as)."
'you're crazy' = '(tu) eres/usted es loco/loca' (informal/formal; male/female)
'your crazy' (as in e.g. 'your crazy friend') = '
'tu/su amigo/a loco/a' (informal/formal; male/female)
Estás loco/a (Male/Female) (Informal)
Está loco/a (Male/Female) (Formal)
La gente güera es loca. You can also say, "Los güeros son locos." It means, "The whites are crazy." In Spanish, it's not the people ARE, it's the people IS.
Senora loca o mujer loca.
¿Eres loco?
Bésame el trasero that's how u say you are crazy about me
loco
You can say "Estoy loco(a)".
¿Eres loco?
Me vuelves loco/a.
No estoy loco
Estamos locos
You say, "tortuga loca."
You could say "Sombrero loco".
no demente, desquisiado, son others ways to say crazy.
loco por ella
poeta loco