n. 往来无定的临时工

[ noun ]
a member of the baby boom generation in the 1950s
<noun.person>
they expanded the schools for a generation of baby boomers

Boomer \Boom"er\, n.
1. One who, or that which, booms.

2. (Zo["o]l.) A North American rodent, so named because it is
said to make a booming noise. See {Sewellel}.

3. (Zo["o]l.) A large male kangaroo.

4. One who works up a ``boom''. [Slang, U. S.]

Sewellel \Se*wel"lel\, n. [Of American Indian origin.]
(Zo["o]l.)
A peculiar gregarious burrowing rodent ({Haplodon rufus}),
native of the coast region of the Northwestern United States.
It somewhat resembles a muskrat or marmot, but has only a
rudimentary tail. Its head is broad, its eyes are small and
its fur is brownish above, gray beneath. It constitutes the
family {Haplodontid[ae]}. Called also {boomer}, {showt'l},
and {mountain beaver}.