Bad meaning

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

“take the bad with the good”

having undesirable or negative qualities

“a bad report card”

“his sloppy appearance made a bad impression”

very intense

“a bad headache”

“in a big rage”

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

“my throat feels bad”

“she felt bad all over”

(of foodstuffs) not in an edible or usable condition

“bad meat”

“a refrigerator full of spoilt food”

feeling or expressing regret or sorrow or a sense of loss over something done or undone

“felt regretful over his vanished youth”

“regretful over mistakes she had made”

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”

physically unsound or diseased

“has a bad back”

“a bad heart”

capable of harming

“bad air”

“smoking is bad for you”

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”

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

“the injury hurt badly”

“the buildings were badly shaken”

very much; strongly

“I wanted it badly enough to work hard for it”

“the cables had sagged badly”