When you see a status on Facebook, and you like it within one minute of its posting. Can be conjoined with megalike to form the megainstalike.
by poobicus October 26, 2010

The act of receiving, or giving, a Facebook 'like' instantly after posting a comment or status update.
(12:30) Dan: "Keep your pimp hand strong"
(12:30:05) Cody: *like*
(12:32) Dan: (to himself) "Ah, an instalike. Nice."
(12:30:05) Cody: *like*
(12:32) Dan: (to himself) "Ah, an instalike. Nice."
by Big C My Friends June 01, 2011
