A mans use of his thumbs to help insert a limp penis into female vagina. May also be a double shoe horn if one thumb does not assist the limp penis and requires both thumbs for full penetration. I’m some extreme cases a quadruple shoe horn has been reported which involves using a friends thumbs in addition to yours to penetrate.
Future climate modelling: to build a coupled atmosphere ocean climate model at the last moment and enter it into the Intergovernmental Panel on Climate Change (IPCC) next Assessment Report. And then expect people to take climate change seriously based on the preliminary results.
"Who would be so crazy as to try and shoe horn a model into the IPCC?"