1 definition by slovaksensation

Top Definition
The act of using the text message feature of a cellular telephone to vividly act out sexual acts. Similar to cybersex, but pertains exclusively to the use of text messaging - does not include instant messaging or the use of a webcam.
I had thumbsex with my girlfriend in class today, and the girl sitting next to me saw my boner.
by slovaksensation July 10, 2008

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