gee·zer (gē'zər) n.
Slang An old person, especially an eccentric old man.
[Probably alteration of dialectal guiser, masquerader, from Middle English gysar, from gysen, to dress, from gyse, guise, fashion; see guise.]
Word History: A relationship with a word we know well is disguised in the word geezer. A clue to this relationship is found in British dialect. The English Dialect Dictionary defines geezer as "a queer character, a strangely-acting person," and refers the reader to guiser, "a mummer, masquerader." The citations for guiser refer to practices such as the following: "People, usually children ... go about on Christmas Eve, singing, wearing masks, or otherwise disguised," the last word of this passage being the one to which geezer is related.
n. a strange old man; a buzzard. : He is a nice geezer, but a little talkative.
n. a drink of liquor. : Toss down a geezer of this stuff and see how you like it.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition. Copyright 2007. Published by McGraw Hill.
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Word Origin & History
geezer
1885, variant of obs. Cockney guiser "mummer" (see guise).