Eph 5:4 says "Let there be no...silly talk,
KJV- foolish talking translated " buffoonery", "silly talk".
Strong's Number: 3473
Transliterated: morologia
Phonetic: mo-rol-og-ee'-ah
Text: from a compound of 3474 and 3004; silly talk, i.e. buffoonery: --foolish talking.
nor levity,
KJV- jesting translated "wit of doubtful morality", " words and
suggestion of doubtful and double meaning."
Strong's Number: 2160
Transliterated: eutrapelia
Phonetic: yoo-trap-el-ee'-ah
Text: from a compound of 2095 and a derivative of the base of 5157 (meaning well-turned, i.e. ready at repartee, jocose); witticism, i.e. (in a vulgar sense) ribaldry: -- jesting.
which are not fitting; but instead let there be thanksgiving
KJV- giving of thanks
Strong's Number: 2169
Transliterated: eucharistia
Phonetic: yoo-khar-is-tee'-ah
Text: from 2170; gratitude; actively, grateful language (to God, as an act of worship): --thankfulness, (giving of) thanks(-giving).
Does this mean we should not tell jokes, make wisecracks, or inject humor into things?
Probably not, but one must be careful not to bring reproach on the Lord Jesus Christ.
Titus 2
1. But speak thou the things which become sound doctrine:
2. That the aged men be sober, grave, temperate, sound in faith, in charity, in patience.
3. The aged women likewise, that they be in behaviour as becometh holiness, not false accusers, not given to much wine, teachers of good things;
4. That they may teach the young women to be sober, to love their husbands, to love their children,
5. To be discreet, chaste, keepers at home, good, obedient to their own husbands, that the word of God be not blasphemed.
6. Young men likewise exhort to be sober minded.
7. In all things shewing thyself a pattern of good works: in doctrine shewing uncorruptness, gravity, sincerity,
8. Sound speech, that cannot be condemned; that he that is of the contrary part may be ashamed, having no evil thing to say of you.
9. Exhort servants to be obedient unto their own masters, and to please them well in all things; not answering again;
10. Not purloining, but shewing all good fidelity; that they may adorn the doctrine of God our Saviour in all things.
11. For the grace of God that bringeth salvation hath appeared to all men,
12. Teaching us that, denying ungodliness and worldly lusts, we should live soberly, righteously, and godly, in this present world;
13. Looking for that blessed hope, and the glorious appearing of the great God and our Saviour Jesus Christ;
14. Who gave himself for us, that he might redeem us from all iniquity, and purify unto himself a peculiar people, zealous of good works.
15. These things speak, and exhort, and rebuke with all authority. Let no man despise thee.