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1.
The state you are in, when sitting nearby a couple having sex, and you can't get away.
John and Jill was so in to each other, having sex without even noticing me...
I felt so bysexual, i could creep in to a mousehole!
by hvahelvede June 19, 2011
 
2.
Someone Male Or Female Who "Likes" Men And Women... Not a Lesbian And Not a Fag, Because they still liek the opposite sex but they also liek the same sex.
Maddona! Or in A Sentance: I THink That Chick Was A Bysexual She Was Hitting ON ME aNd Asking ME TO Do Stuff To Her Ive Never Even Heard Of!
by $57 July 05, 2006