The meaning of the Acronym SIP is...

SIP is

• Sin In Pants
• Shit In Pants

More Meanings For SIP:

• Scilab Image Processing
• Software Input Panel
• Single In-line Package
• SMDS Interface Protocol
• Session Initialization Protocol
• System Interface Procedure
• Self Initiated Program
• Session Initiation Protocol
• Service Interface Point
• Single In-line Package
• Single In-line Package
• Statistically Improbable Phrase
• Simulations In Physics
• Spring Intensive Program
• Student Initiated Project

SIP is also in:

• Amateur Radio
• Electronics
• General
• Hardware
• Libraries
• Networking
• Physics
• Software
• Telecom
• Universities