The meaning of the Acronym SIN is...

SIN is

• Success Ignoring Nature
• Signatures In Need
• Special Item Number

More Meanings For SIN:

• System Identification Number
• Static Ip Notification
• Secure Identification Number
• Self Imposed Nonsense
• Student Infraction Notice
• Student Information Network
• Sexuality Information Network
• Sex Issues And News
• Smuggler Interstellar Network
• Self Induced Nihilism
• Servicio Inteligencia Nacional
• Soul In Need
• Super Intelligent Network
• Somewhere Into Nowhere
• Self Inflicted Nonsense

SIN is also in:

• Adults
• Chat
• General
• Networking
• Science Fiction
• Security
• Unfiled
• Universities