Tu es fea mean

That's incorrect Spanish grammar.

The conjugation of the verb SER in that instance (for the pronoun 'Tú' or 'You') is 'eres', not 'es'.

Tú eres fea means 'you are ugly' in Spanish. 'Fea' is the Spanish Word for 'ugly', one example being 'Betty La Fea', which is the Spanish version of the title of the English version of the universally popular television series 'Ugly Betty'.