Definitions of frisk:

• noun:   the act of searching someone for concealed weapons or illegal drugs
• verb:   search as for concealed weapons by running the hands rapidly over the clothing and through the pockets

  Example: "The police frisked everyone at the airport"

• verb:   play boisterously
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #17770)