(derogatory) A lazy and/or irresponsible person who is often unemployed, often depending upon wealthy or otherwise financially independent people for support. / A person who defaults on debts.

(of an instrument) having a damped needle that stops without oscillation / defaulting on one's debts / defeated or exhausted / (derogatory) lazy or irresponsible / dead tired

plural of deadbeat

(chiefly US and Canada, idiomatic, derogatory) A man, especially one who is divorced or estranged from his partner, who fails to provide monetary child support when he is legally required to do so.

plural of deadbeat dad