swing both ways
US /swɪŋ boʊθ weɪz/
UK /swɪŋ boʊθ weɪz/

1.
ser bisexual, gustar de ambos sexos
to be bisexual; to be attracted to both men and women
:
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She mentioned that she swings both ways, so she's open to dating anyone.
Mencionó que le gustan ambos sexos, así que está abierta a salir con cualquiera.
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It's not uncommon for people to swing both ways.
No es raro que la gente sea bisexual.