-you laughed
The word reísteis is the preterite form of reír in the second person plural.
See the full reír conjugation


Y todos os reísteis de mí.
And you all made fun of me.
La última vez que pedí tu ayuda los dos os reísteis en mi cara.
Last time I asked for your help, you both laughed in my face.
¿Por qué no os reísteis de nosotros?
Why'd you cut us in on the bust?
¿Por qué os reísteis entonces cuando dije que no me gustaban los hombres?
Why did you laugh then, when I said man delights not me?
¿Os reísteis a mis espaldas?
Did you laugh at me behind my back?
¿Os abrazastéis, reísteis y llorasteis?
Did you hug and laugh and cry?
Estoy segura que os reísteis mucho de mí.
I bet you two had a right laugh.
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