The Karma of fucking over a good person
Is the asshole you end up with
Get a taste of your own medicine
Funny, you the one who end up sick

from Fabolous (Ft. Joe Budden & Teyana Taylor) – Want You Back Lyrics on Rap Genius

Meaning

Karma is a bitch.

Fab is saying, when you fuck somebody over, you’ll also get a chance to know what that feels like in the end “get a taste of your own medicine”

He makes a clever connection between medicine and being sick.

You end up sick (fucked over) when you take too much of your own medicine (fucking someone over, or overdosing).

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