Stephanie Lacoste Gularte (born 9 September 1996), also known as Fefa, is a Uruguayan footballer who plays as a centre back for Peruvian side Club Universitario de Deportes and the Uruguay women's national team.
In January 2020, Lacoste joined Portuguese club Famalicão. In June 2020, she joined Spanish club Real Oviedo. In 2021, she joined Paraguayan club Sol de América.
Lacoste represented Uruguay at the 2014 South American U-20 Women's Championship. At senior level, she played the 2014 Copa América Femenina.