ever wonder phrase start phrase prime pump widely consider mean use government money get project go date back 1800s president donald trump claim invent phrase reality use phrase prime pump predate trump birth hundred years use current economic sense exist since 1930s.in recent conversation economist exchange happen talk trump tax plan economist beyond ok tax plan increase deficit trump ok increase long may two years understand expression prime pump economist yes trump prime pump economist keynesian trump highest-taxed nation world hear expression particular type event economist prim pump trump yeah hear economist yes trump hear expression use hear mean come couple days ago think good do.according free dictionary prime pump encourage growth action something marjorie try prime pump offer new issue discussion late 1800s expression originally use pour liquid pump expel air make work 1930s apply government efforts stimulate economy thereafter apply undertakings.it hardly surprise trump never hear phrase rarely use twitter would take credit week many gaffes lie strange behavior may big issue clear little man know little understand world reality rest us live another explanation could trump much much old lead believe go completely senile.featured image via photo joe raedle/getty image trump display incredible ignorance yet claim credit term coin hundred years ago