The difference between Genderfluid and Queer

Genderfluid as an adjective (LGBT):

Not having a fixed gender.

Queer as an adjective (dated):

Weird, odd or different; whimsical.

Queer as an adjective (Britain, informal, dated):

Slightly unwell (mainly in to feel queer).

Queer as an adjective (colloquial, sometimes, pejorative):

Homosexual.

Queer as an adjective (colloquial, sometimes, pejorative):

Not heterosexual: homosexual, bisexual, asexual, etc.

Queer as an adjective (broadly):

Pertaining to sexual behaviour or identity which does not conform to conventional heterosexual norms, assumptions etc.

Queer as a noun (colloquial, sometimes, pejorative):

A person who is or appears homosexual, or who has homosexual qualities.

Queer as a noun (colloquial, sometimes, pejorative):

A person of any non-heterosexual sexuality or sexual identity.

Queer as a noun (definite, with "the", informal, archaic):

Counterfeit money.

Queer as a verb (transitive):

To render an endeavor or agreement ineffective or null.

Queer as a verb (UK, dialect, dated):

To puzzle.

Queer as a verb (slang, dated):

To ridicule; to banter; to rally.

Queer as a verb (slang, dated):

To spoil the effect or success of, as by ridicule; to throw a wet blanket on; to spoil.

Queer as a verb (social science):

To reevaluate or reinterpret (a work) with an eye to sexual orientation and/or to gender, as by applying queer theory.

Queer as an adverb:

Queerly.