someone who can be employed as a detective to collect information
"My neighbor hired a private sherlock to dig up dirt on his cheating spouse before filing for divorce."
To deduce.
"When I typed her name into the database, it automatically corrected my lowercase input to display as Sherlock."
Alternative letter-case form of Sherlock
An English surname, from nicknames.
"The detective named Sherlock arrived at the crime scene just after midnight."