Com being short for communication. text com is when 2 people stood or sat down next to each communicating via text message. This is either done when in a place where you can't hear what person is saying or where theres a group of more than three people and 2 people and want to keep the things they are saying a secret.
Bill: Sally and John keep on texting. I wonder who they are texting.

Shaun: there doing that text Com thing. Search Urbun Dictionary for what it means.
by Oh-Ma-hiar August 31, 2010
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