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1.
1. Using a Nokia N-Gage as a cell phone, thus appearing to hold a sideways taco to one's face.

2. Mimicing the use of a Nokia N-Gage as a cell phone.

3. Holding anything up to your face sideways and talking into it.
I was sidetalking when I held that Super NES up to my face sideways and took a picture of myself talking into it.
by The Sound Guy November 03, 2003
56 17
 
2.
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?!
by NOM NOM NOM HAPPYFACE August 05, 2009
7 4
 
3.
it's what you do with a Nokia N-Gage. you talk in it's side!
thank god i got the sidetalking feature on my n-gage. otherwise the screen would keep getting nasty from my face grease.
by bessie31 April 25, 2011
2 3