The person asking the question is talking about a brain teaser. It is probably the the one which shows the word 'swear' over bible, and resolves to 'swearing on The Bible".
Or, just possibly, "swear on a stack of bibles".
mosquito
Backwards
Big Brained (or smart)
Turkey in the straw
Pea pod.
Double or nothing
Big Brained (or smart)
It mean "clever after thought"
Seasons
"Open sesame."
2 rights
Noon tea.