Definition 1 of 1
Egg tokens are typically sold in booklets of several perforated stamp-sized tokens ususally in pale-yellow, -blue, -green colour with red or black stamped numbers/dates and some other identifier (to prevent forgery).
(The cleverer ones simply bribe or blackmail mess-boys to serve them eggs for free or have these secreted and served late or direct to their rooms, for free)
Egg-tokens are seen as signs of affluence when they are freely given away to close-friends. Others connive to sit next to someone who would share when asked nicely.
Mani: Fuk off da, you still owe me from last time.