slip_in
1. [ verb ] insert casually
Synonyms: stick_in insert sneak_in
Examples:

"She slipped in a reference to her own work"

Related terms: add spatchcock
Similar spelling:   sleep_in
  sloping
  slip_on
  slipping
  slopingly
  sloppiness
  slip_noose
  slip-on
  Slevin
  Slavin
  slap_on
  sleeping