ayt

from The Collaborative International Dictionary of English v.0.48
Eyot \Ey"ot\ ([imac]"[o^]t or [=a]t), n. [Ey (AS. [imac]g or
   Icel. ey) + F. dim. termination -ot; cf. AS. [imac]geo[eth].
   See {Island}, and cf. {Ait}.]
   A little island in a river or lake. See {Ait}. [Written also
   {ait}, {ayt}, {ey}, {eyet}, and {eyght}.] --Blackstone.
   [1913 Webster]
    
from The Free On-line Dictionary of Computing (8 July 2008)
AYT

   <chat> Are you there?

   (1996-03-09)
    

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