overegg
Chiefly in over-egg the pudding: to spoil (something) by exaggerating it, or an aspect of it; to overdo.
transitive
But hard riding men, in strange countries, are apt now and then to over-egg the pudding, as the Yorkshire landlord told his Grace of Cleveland.
Where it comes from
From over- (prefix meaning ‘excessive; excessively’) + egg, from the phrase over-egg the pudding, a reference to adding too many eggs to a pudding and thereby ruining it.
Adapted from the Wiktionary entry overegg (CC BY-SA 4.0).