Word forms: bright sparks
countable noun If you say that some bright spark had a particular idea or did something, you mean that their idea or action was clever, or that it seemed clever but was silly in some way. [British, informal] ⇒ 'Why not give out one of the cybercafe's e-mail addresses?' suggested one bright spark. ⇒ Some bright spark turned the heating off last night!
COBUILD Advanced English Dictionary. Copyright © Harper Collins Publishers