look up any word, like timebomb:
 
1.
Verb.
The act of putting your fingertips together, most likely to indicate thoughtfulness.

So named because this action makes one's hands look vaguely like a steeple.
The following children's hand game shows an example of steepling:
This is the church; this is the steeple; open the doors, and there's all the people.
by Mysterious C June 20, 2006