look up any word, like swag:
 
1.
politically or in terms of pop culture: something that has potential or is going to be around a while, or "go far"
Bush handler: This reverse robin hood policy is an idea with legs... We just have to spin it right.

Failed entrepreneur: Car alarms that sing opera! Now there's an idea with legs!
by Honor December 24, 2005
 
2.
in a restaurant, to go or ala carte
I will take that order with legs.
by bw December 04, 2004