$ echo one two three |cut -d ' ' -f 2-
two three

$ S="one two three"; echo ${S#* }
two three

$ S="one two three"; echo "$S" | sed 's/[^ ]\+ \(.*\)/\1/'
two three

$ S="one two three"; echo "$S" | cut -d ' ' -f 2-
two three

rain@acnote:~$ b='one two three'
rain@acnote:~$ a(){ shift;echo $@;}
rain@acnote:~$ a $b
two three