As a plane captain in the Navy, hand signals were a part of my everyday life! I was parked at the supermarket once and a lady with her young daughter got out of their car, but their headlights were on!! So I honked, and when she looked over, I touched my nose with my right hand and with my left made a grabby-grabby motion!!!
In PC'ing Hawkeyes, that means your noselight is on...!
In civilian life apparently that means… “Let me touch your daughter!"