Neither filthiness, nor foolish talking, nor jesting, which are not convenient: but rather giving of thanks.
Filthiness - in act or gesture.
Foolish talking - the talk of fools: folly and sin together. It х moorologia (G3473)] and "filthiness" х aischrotees (G151)] occur nowhere else in the New Testament. Nor - rather, 'or' (cf. Ephesians 5:3).
Jesting, (polished) [Greek, `eutrapelia (G2160):' nowhere else in the New Testament] - that versatility which turns about, adapting itself, without regard to principle, to the squirting circumstances of the moment, and the varying moods of those around. Refined 'persiflage' and 'bad-image,' for which Ephesus was famed (Plautus, 'Miles Gloriosus,' 3: 1, 42-52): so far from being censured, it is thought by the world a pleasant accomplishment. "Filthiness" (cf. Colossians 3:8) refers to the foulness, "foolish talking" to the folly, "jesting" to the false refinement (and trifling witticism: Tittmann), of discourse unseasoned with the salt of grace (Trench).
Not convenient - `unseemly' not such 'as become saints' (Ephesians 5:3). [Romans 1:28 mee (G3361) katheekonta (G2520), subjectively, "not convenient;" here, ouk anekonta, objectively so (Ellicott).]
Rather giving of thanks - a happy play on sounds: eucharistia (G2169) contrasted with eutrapelia (G2160). Refined "jesting" sometimes offends the tender feelings of grace; "giving of thanks" gives that real cheerfulness to believers which the worldly try to get from "jesting" (Ephesians 5:19-20; James 5:13).