名詞 throwaway:

1. a homeless boy who has been abandoned and roams the streets
   同義詞：street arab, gamin
2. an advertisement (usually printed on a page or in a leaflet) intended for wide distribution
   同義詞：circular, handbill, bill, broadside, broadsheet, flier, flyer
3. words spoken in a casual way with conscious under-emphasis

形容詞 throwaway:

1. thrown away
   同義詞：cast-off, discarded, thrown-away
2. intended to be thrown away after use