Green’s Dictionary of Slang

finna v.

also funna
[elision of SE fixing to]

(orig. US black) to get oneself ready, to prepare; also of objects.

[US]College Sl. Research Project (Cal. State Poly. Uni., Pomona) 🌐 Funna (phr.) About to; going to.
Online Sl. Dict. 🌐 finna adj 1. about to.
[US]Ebonics Primer at www.dolemite.com 🌐 finna Definition: contraction of ‘fixing to’ Example: I finna whup his ass.
[US]in J. Miller Getting Played 56: ’Then [the girls] come out cryin’, sayin “I’m fina go home”’.
[US]C. Eble (ed.) UNC-CH Campus Sl. Spring 2014 Fall 3: FINNA — < fixing to on the point of: ‘Hold that flag up—it’s finna get dirty’.
[UK]Unknown T ‘Homerton B’ 🎵 Man get fried, finna duck them chickens.