1. slammer(n = noun.person) - a person who closes things violently; "she's a dramatic slammer of doors"
is a kind of closer, finisher
Derived form verb slam1
2. slammer(n = noun.artifact) clink, gaol, jail, jailhouse, pokey, poky - a correctional institution used to detain persons who are in the lawful custody of the government (either accused persons awaiting trial or convicted persons serving a sentence);
is a kind of correctional institution
has particulars: bastille, holding cell, hoosegow, hoosgow, house of correction, lockup, workhouse
slammer, n. (usu. prec. by the) sl. prison.