1. Rolling on the floor laughing; indicates that something is thought to be highly amusing
   - ROFL

Encyclopedia: ROTFL

• no-go
• no-go area
• no-goal
• no-good
• no-hit
• no-hit game
• no-hitter
• no-hoper
• no-no
• no-nonsense
• no-par stock
• no-par-value stock
• no-parking zone
• no-see-um
• no-show
• no-side
• no-trump
• no-win
• no-win situation
• NOAA
• Noachian
• Noachian deluge
• Noah
• Noah and the Flood
• Noah Webster