Question

I wish he'd lighten up a bit and realize that we were only joking.

Accepted Answer

(idiomatichttps://en.wiktionary.org/wiki/Appendix:Glossary#idiomatic) To become less serioushttps://en.wiktionary.org/wiki/serious and more cheerfulhttps://en.wiktionary.org/wiki/cheerful or casualhttps://en.wiktionary.org/wiki/casual; to relaxhttps://en.wiktionary.org/wiki/relax.

Sentence	I wish he'd lighten up a bit and realize that we were only joking.
Definition	( idiomatic https://en.wiktionary.org/wiki/Appendix:Glossary#idiomatic ) To become less serious https://en.wiktionary.org/wiki/serious and more cheerful https://en.wiktionary.org/wiki/cheerful or casual https://en.wiktionary.org/wiki/casual ; to relax https://en.wiktionary.org/wiki/relax .

I He'd Lighten Bit Realize Joking