the act of being slightly or blatantly bisexual while under the influence of alcohol/narcotics.
Jeff- Man you are looking pretty hot tonight, we should hang out more
Tim- Ok now I think you had to much to drink you are getting a little bromiscuious
Man 1- Why is he flirting with that guy? Doesnt he have a girlfriend?
Man 2- Ya he does but he has a little bromiscuity
in him when he drinks