Dutch Etymology From slapen (“to sleep”) + gast (“guest”). Pronunciation IPA(key): /ˈslaːp.xɑst/ Hyphenation: slaap‧gast Noun slaapgast m (plural slaapgasten, diminutive slaapgastje n) a guest who stays at least one night, sleeping in his host's homeWikiwand - on Seamless Wikipedia browsing. On steroids.