flummox
To confuse; to fluster; to flabbergast.
transitive
With United's movement flummoxing the visitors, Berbatov saw his low shot saved well by Ben Foster on his first return to Old Trafford.
To give in, to give up, to collapse.
intransitive, uncommon
Where it comes from
Uncertain, probably risen out of a British dialect (OED finds candidate words in Herefordshire, Gloucestershire, southern Cheshire, and Sheffield). The formation seems to be onomatopœic, expressive of the notion of throwing down roughly and untidily. [OED]. First use appears c. 1837 in the writings of Charles Dickens.
Adapted from the Wiktionary entry flummox (CC BY-SA 4.0).