Adj. The act of talking on your phone while holding it sideways. Started by the Nokia n-gage, where the phone had to be held in a "taco-like" style in order to talk on it due to he fact that the mic and reciever were located on the top side of the phone
Ex. of a side-talker Side-Talking.
Side-Talker: Hold up man I got a call coming in
*takes out phone
Non Side-talker: Is that the N-gage?
Side-Talker:Ye
*Holds phone up to ear in a sideways fashion
Non Side-talker:...................... what the fuck?!
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