1 definition by Kevin H***ley
An online term that depects ''Smile-In-Sight'' used when you don't go as far as to laugh, but a smile still spreads upon your face.
by Kevin H***ley July 10, 2008
Get the SIS neck gaiter and mug.
• © 1999-2021 Urban Dictionary ® • advertise • terms of service • privacy • dmca • bug report • help • blog • data subject request
