What is this guck on the bottom of my shoe?The doctor painted some nasty guck on my throat and told me not to swallow for a while.
guck
slang Any gelatinous, slimy substance. Possibly a portmanteau of "goo" and "muck." Ugh, the guck they put on you before doing an ultrasound always feels so cold and gross.
guck
(gək)
n. a thick, sticky substance; yuck. The doctor painted some nasty guck on my throat and told me not to swallow for a while.