spell trouble
US /spɛl ˈtrʌb.əl/
UK /spɛl ˈtrʌb.əl/

1.
causar problemas, augurar problemas
to indicate that something bad is likely to happen
:
•
His constant tardiness could spell trouble for his job.
Su tardanza constante podría causar problemas en su trabajo.
•
The dark clouds on the horizon spell trouble for our picnic.
Las nubes oscuras en el horizonte auguran problemas para nuestro picnic.