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(as) crazy as a bedbug

Insane. Often used jocularly. Primarily heard in US. Don't leave me alone with Uncle Stu, he's crazy as a bedbug!
See also: bedbug, crazy

don't let the bedbugs bite

cliché Sleep soundly and well. Part of the sing-song rhyme "good night, sleep tight, don't let the bedbugs bite," usually said to a child. I'll see you in the morning, love. Don't let the bedbugs bite!
See also: bedbug, bite, let
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

crazy as a bedbug

If you describe someone as crazy as a bedbug, you mean that their behaviour is very strange or silly. By now she'd concluded that Peters was crazy as a bedbug. Note: Bedbugs are small wingless insects that live in beds and bedding. They feed by biting people and sucking their blood.
See also: bedbug, crazy
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
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References in periodicals archive ?
Researchers from theUniversity of Sheffieldrevealed that bedbugs evolved more than 100 million years ago - 50 million years earlier than previously thought.
CONTAMINATION Bid to kill bedbugs will include boil-washing pupils' clothes
After spending 15 years scouring caves, cliffs, and museums for the origin of bedbugs, a team of researchers has confirmed that these critters roamed Earth at least 100 million years ago, the same time that dinosaurs flourished!
Bedbugs rank high among the list of most unwanted human bedfellows but until now, little was known about when they first originated.
Cruz and her daughters are finally back in Manila, and said their goal is to not let any of the bedbugs infest their house.
But it's the bedbugs that have the global insurer worried.
The lawsuit points to Erickson Living's website, which touts "maintenance-free apartment homes" andpromises residents won't have to worry about surprise costs for home repairs, to argue that the defendant should not have to pay the $20,000 cost the companies said was needed to remediate the bedbug infestation.
15= Bablake The biggest ward geographically, it has an impressively low number of bedbug call-outs.
Bedbugs: A primer for the health-system pharmacist.
As for the Oklahoma City hotel, it told ESPN that its bedbug problem was isolated to the one room occupied by Irving and that "all necessary steps have been taken" for remediation.
Biloxi, MS, July 02, 2016 --( Bedbugs hide anywhere and can quickly add misery to a vacation.
But their trip to celebrate Christine's birthday turned into a nightmare when they were attacked by vicious bedbugs.
But Sue's sweet dreams quickly turned to horrific, blood-sucking nightmares because the mattress was full of hungry bedbugs.
According to Specialty Products Consultants, which monitors the global pest management industry, revenues derived from bedbug control have risen 5.6 per cent over the last year, a trend that is expected to continue.
However, when we got a bedbug infestation, Sally said it was our fault.