1. Acknowledgment of message received
   - 10-4 [US]

Encyclopedia: Ten-four

• shitless
• shitlist
• shits and giggles
• shittah
• shittah tree
• shitter
• shittim
• shittimwood
• shitting
• shitty
• shitwork
• shiv
• shiva
• shivah
• Shivaism
• Shivaist
• shivaree
• shive
• shiver
• shivering
• shivery
• shiznit
• shlemiel
• shlep
• shlepper