thumbsucker

an immature person.
donald trump is a thumbsucker.
an adult who whines about very trivial things. making them appear childish.
a woman sitting at a traffic light, behind a car displaying a non-christian evolve fish emblem, yelled unchristian obscenities to the driver.
the p-ssenger in the car next to her rolled down his window, and calmly asked? “do you realize how childish your behaving?”
at this she screamed more angry obscenities.
the p-ssenger calmly waited for her to calm down, and as if speaking to a child, said. “where’s your mommy? thumbsucker.”
to be pathetic and lousy at something.
“i am totally a thumb sucker in that controller thrower game”
(definition not related to the movie by the same t-tle)

apparently a newspaper article that veep d-ck cheney, (rumored de facto president), seeks to discredit.

possibly reflecting british slang for “immature weakling” implying that intellectual “weenies” are piling onto cheney’s decline in power with pondering -n-lysis.

on “meet the press”, 9/10/06, host tim russert questioned the vice president about an article in the new york times published on the same day ent-tled “cheney’s power no longer goes unquestioned” by david e. sanger and eric schmitt.

(admittedly the specific meaning needs pegging better, but hey this is a start.)
“…that (new york times article) is just another one of those thumbsuckers…” — richard “deadeye d-ck” cheney (sept. 10, 2006)
a guy who is actually an idiot, geek, goofus, stupid and behaves like a dumb.
joe is such a thumb sucker, he still plays with marbles.