bad

having undesirable or negative qualities

• “a bad report card”
• “his sloppy appearance made a bad impression”
• “a bad little boy”
• “clothes in bad shape”
• “a bad cut”
• “bad luck”
• “the news was very bad”
• “the reviews were bad”
• “the pay is bad”
• “it was a bad light for reading”
• “the movie was a bad choice”

very intense

• “a bad headache”
• “in a big rage”
• “had a big (or bad) shock”
• “a bad earthquake”
• “a bad storm”

feeling physical discomfort or pain (`tough'' is occasionally used colloquially for `bad'')

• “my throat feels bad”
• “she felt bad all over”
• “he was feeling tough after a restless night”

(of foodstuffs) not in an edible or usable condition

• “bad meat”
• “a refrigerator full of spoilt food”

not capable of being collected

• “a bad (or uncollectible) debt”

below average in quality or performance

• “a bad chess player”
• “a bad recital”

nonstandard

• “so-called bad grammar”

not financially safe or secure

• “a bad investment”
• “high risk investments”
• “anything that promises to pay too much can”
• “;”

physically unsound or diseased

• “has a bad back”
• “a bad heart”
• “bad teeth”
• “an unsound limb”
• “unsound teeth”

capable of harming

• “bad habits”
• “bad air”
• “smoking is bad for you”

keenly sorry or regretful

• “felt bad about letting the team down”
• “was sorry that she had treated him so badly”
• “felt bad about breaking the vase”

characterized by wickedness or immorality

• “led a very bad life”

reproduced fraudulently

• “like a bad penny...”
• “a forged twenty dollar bill”

not working properly

• “a bad telephone connection”
• “a defective appliance”

that which is below standard or expectations as of ethics or decency

• “take the bad with the good”

with great intensity (`bad'' is a nonstandard variant for `badly'')

• “the injury hurt badly”
• “the buildings were badly shaken”
• “it hurts bad”
• “we need water bad”

very much; strongly

• “I wanted it badly enough to work hard for it”
• “the cables had sagged badly”
• “they were badly in need of help”
• “he wants a bicycle so bad he can taste it”