verb: To write a thesis or the act of working on a rather extensive thesis project.
verb (alt.): To overuse text within the body of your thesis proposal, in some cases making the proposal more exciting than the thesis actually will be.
She sat at her computer all morning thesizing, only to have finished part of her bibliography by noon.
She was thesizing eloquently and for a moment believed that this thesis wasn't going to be so bad after all.