adj Unfavorable; negative; not good.
adj Not suitable or fitting.
adj Not appropriate, of manners etc.
adj Unhealthy; liable to cause health problems.
adj (chiefly applied to a person's state of health) Sickly, unhealthy, unwell.
adj Not behaving; behaving badly; misbehaving; mischievous or disobedient.
adj Tricky; stressful; unpleasant.
adj Evil; wicked.
adj Faulty; not functional.
adj (of food) Spoiled, rotten, overripe.
adj (of breath) Malodorous; foul.
adj False; counterfeit; illegitimate.
adj Unskilled; of limited ability; not good.
adj Of poor physical appearance.
adj (informal) Bold and daring.
adj (slang) Good, superlative, excellent, cool.
adj (of a need, want, or pain) Severe, urgent.
adj (US, slang) Overly promiscuous, licentious.
adj (originally African-American Vernacular, slang, of a woman) Very attractive; hot, sexy.
adj (slang, of a draft/check) Not covered by funds on account.
adv (now colloquial) Badly.
n Something that is bad; a harm or evil.
n (slang, with possessive determiner) Error; mistake.
n (countable, uncountable, economics) An item (or kind of item) of merchandise with negative value; an unwanted good.
v (Britain, dialect, transitive) To shell (a walnut).