As a noun dupper
is alternative form of nodot=yes|lang=en (a kind of bottle.
As a verb dupped is
past tense of dup.
dupped
English
Verb
(head)
(dup)
dup
English
Verb
(en-verb)
to open (a door, gate etc.)
:* 1964': He had seen, that Maundy Thursday afternoon, '''dupping their chamber door in all maaaaaaa innocence. — Anthony Burgess, ''Nothing Like the Sun
Anagrams
*
*
*
----