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Preposition:
on a roll
Usage: informal
Having a
streak
of
good luck
or
good
progress
or
success
"Now I was on a
roll
"
omphalos
omphaloskepsis
Omphalotus
Omphalotus illudens
Omsk
on
on a higher floor
on a lower floor
on a par with
on a regular basis
on a roll
on a tear
on account
on account of
on air
on all fours
on an individual basis
on an irregular basis
on and off
on and on
on appro