noun. The sport of climbing without ropes or other technical gear on boulders or relatively small rock faces.

noun. Climbing, without ropes, on large boulders or boulder-sized objects.

verb. Present participle of boulder.

"I still like top rope better than bouldering; bouldering is all about the upper body strength and the explosive power, and I am (a) a girl and (b) stocky and (c) fat and (d) old, things which collectively make it all the more difficult (Guys like bouldering."