Definitions by slovaksensation

thumbsex 

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.

thumbsex by slovaksensation June 30, 2008