The difference between Badass and Sick

When used as nouns, badass means a belligerent or mean person, whereas sick means sick people in general as a group.

When used as adjectives, badass means belligerent and troublesome, whereas sick means having an urge to vomit.

Sick is also verb with the meaning: to vomit.

check bellow for the other definitions of Badass and Sick

Badass as a noun (US, sometimes considered, _, vulgar, slang, negative connotation):

A belligerent or mean person; a person with an unpleasantly extreme appearance, attitudes, or behavior.

Examples:

"Don’t mess with that guy, he’s a real badass."
Badass as a noun (US, sometimes considered, _, vulgar, youth slang, positive connotation):

A person considered impressive due to courage, skill, and/or toughness.

Badass as an adjective (US, sometimes considered, _, vulgar, slang, negative connotation):

Belligerent and troublesome.
Badass as an adjective (US, sometimes considered, _, vulgar, slang, positive connotation):

Having an extreme appearance, attitude, or behavior that is considered admirable.

Examples:

"That tough guy looks badass."

Sick as an adjective:

Having an urge to vomit.
Sick as an adjective (chiefly, American):

In poor health.

Examples:

"She was sick all day with the flu."
Sick as an adjective (colloquial):

Mentally unstable, disturbed.
Sick as an adjective (colloquial):

In bad taste.

Examples:

"That's a sick joke."
Sick as an adjective:

Tired of or annoyed by something.

Examples:

"I've heard that song on the radio so many times that I'm starting to get sick of it."
Sick as an adjective (slang):

Very good, excellent, awesome, badass.

Examples:

"This tune is sick."

"Dude, this car's got a sick subwoofer!"
Sick as an adjective:

In poor condition.

Examples:

"'sick building syndrome; my car is looking pretty sick; my job prospects are pretty sick'"
Sick as an adjective (agriculture):

Failing to sustain adequate harvests of crop, usually specified.

Sick as a noun:

Sick people in general as a group.

Examples:

"We have to cure the sick."
Sick as a noun (British, colloquial):

vomit.

Examples:

"He lay there in a pool of his own sick."

Sick as a verb:

To vomit.

Examples:

"I woke up at 4 am and sicked on the floor."
Sick as a verb (obsolete, intransitive):

To fall sick; to sicken.