patois vs piece of tail

patois and piece of tail both are nouns.

Word	Noun	Adjective	Verb	Adverb
patois	Yes	No	No	No
piece of tail	Yes	No	No	No

patois (noun)	piece of tail (noun)
a regional dialect of a language (especially French); usually considered substandard	slang for sexual intercourse
a characteristic language of a particular group (as among thieves)