Godan verb with 'mu' ending, Intransitive verb
to bite into (e.g. rope into skin); to cut into; to dig into (e.g. of fingernails)
医者の費用は本当に貯金に食い込む。Doctors' bills really cut into our savings. to eat into; to encroach; to make inroads; to penetrate (e.g. a market); to break into (e.g. first place); to erode; to cut into (e.g. time, savings)
to be wedged (i.e. underwear pulled from the back, driving it between the buttocks)
Vulgar expression or word
Also written 食込む【くいこむ】