Cad

n.	1.	A person who stands at the door of an omnibus to open and shut it, and to receive fares; an idle hanger-on about innyards.
	2.	A lowbred, presuming person; a mean, vulgar fellow.

Noun	1.	cad - someone who is morally reprehensible; "you dirty dog" Synonyms: blackguard, bounder, hound, heel, dog
	2.	CAD - software used in art and architecture and engineering and manufacturing to assist in precision drawing Synonyms: computer-aided design

CAD - Computer Aided Design

Computer Aided Design (CIM)Babbitt, Philistine, arriviste, boor, bounder, bourgeois, churl, clown, epicier, groundling, guttersnipe, hooligan, ill-bred fellow, looby, lout, low fellow, mucker, nouveau riche, parvenu, peasant, ribald, rotter, rough, roughneck, rowdy, ruffian, upstart, vulgarian, vulgarist, yokel