slang
noun.
informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar
their speech was full of slang expressions
noun.
a characteristic language of a particular group (as among thieves)
they don't speak our lingo
verb.
use slang or vulgar language
verb.
fool or hoax
The immigrant was duped because he trusted everyone|You can't fool me!
verb.
abuse with coarse language