david that goliath 

The act of dealing with an altercation in a clever and resourceful manner, especially when in a disadvantageous situation.

"How am I supposed to take down a man significantly stronger than me with nail clippings and a dubious looking document detailing the proceedings of an occult seance?"
"Gee I dunno Sharon, just david that goliath!"

david that goliath by upsidedownrabbit May 21, 2017