навскидку

на (na) +‎ вски́дку (vskídku, “a throwing/tossing up”, in the accusative case)

• IPA^(key): [nɐfˈskʲitkʊ]

навски́дку • (navskídku)

1. (hunting, military, about shooting) offhand (quickly throwing up the gun and not leaning on anything with the elbows)

   це́литься навски́дку ― célitʹsja navskídku ― to aim offhand

2. (figuratively, colloquial) off the top of one's head, offhand, without preparation, roughly, randomly

   Я мог бы навски́дку назва́ть де́сять таки́х челове́к. ― Ja mog by navskídku nazvátʹ désjatʹ takíx čelovék. ― I could name ten people like that off the top of my head.

   Я не по́мню навски́дку. ― Ja ne pómnju navskídku. ― I don't remember offhand.