\version "2.19.12"

lSkip =
#(define-music-function
  (parser location skips)
  (number?)
  #{ 
    \lyricmode {
      " "
      \repeat unfold $(- skips 1) { \skip 1 }
    }
  #})

<<
\new Voice = test \relative { c' c~ c c c c c c }
\new Lyrics \lyricsto test { oh ah __ " " \lSkip 3 eh }
>>