Bad

défectueux

(faulty; not functional)

fonceur

(bold and daring)

mauvais

(unfavorable; negative)

mauvais

(not suitable or fitting)

mauvais

(not appropriate, of manners etc.)

mauvais

(tricky; stressful; unpleasant)

mauvais

(evil, wicked)

mauvais

(unskilled)

mauvaise

(of breath: malodorous)

méchant

(evil, wicked)

nul

(unskilled)

urgent

(severe; urgent)

faute

(error, mistake)

gaffe

(error, mistake)