Top Definition
The drug induced coma-like experience one undergoes when consuming large quantities of the cold medicine Robitussin when either fighting a cold or being completely healthy.
OMG I was so sick last week that I took a crap-ton of Robitussin and slipped into a Robo-coma!

Dude...I was in a Robo-coma for like two days after that flu hit me last week!
by Sweet_Melissa January 10, 2011

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