Top definition
Stands for "Only Identifiable By Book." Used to name people you never knew exsisted untill you found them in the yearbook.
by Aktion_T4_1942 November 27, 2005
May 3 Word of the Day
Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)
Monica: Oh yay! I made a new mutual today because we started following & talking to eachother on twitter and we like eachother (so it seems).
by qtheresurrection March 25, 2015