Entry 2 senses · 2 variants Webster, 1913 Grubby · Grub·by · IPA /ˈɡɹʌbi/ a. n. 01 a. Dirty; unclean. 1. Dirty; unclean.[Colloq.] “The grubby game of marbles.” — Lond. Sat. Rev. 02 n. Any species of Cottus; a sculpin. 1. Any species of Cottus; a sculpin.(Zool.) [Local, U. S.]