Concise Oxford English Dictionary
oomph
(also umph)
■ noun informal the quality of being exciting, energetic, or sexually attractive.

1930s: perh. imitative.
…
EngMac
oomph
(n sl) енергија
oomph (n sl)
енергија
…
Merriam-Webster Collegiate® Dictionary
oomph
Pronunciation: ‘u̇m(p)f
Function: noun
Etymology: imitative of a sound made under exertion
Date: 1936

1 : personal charm or magnetism : GLAMOUR
2 : SEX APPEAL
3 : PUNCH, VITALITY