(idiomatic) This may be surprising, but it's true.

Alternative spelling of sticktoitiveness

plural of itaconate

(chemistry) Any salt or ester of itaconic acid.

Of or pertaining to itaconic acid or its derivatives

(slang, idiomatic) To achieve a penile erection.

(UK) an exclamation of joy

(idiomatic) Even if that is the case; whether that is true or not; nevertheless.

(slang) To dance.

In the current state or circumstance.