Verb (5-dan, く, intransitive)
1. to bite at; to snap at; to nibble
生き物がたちまち餌に食いついた。The creature snapped at the bait at once.
2. to jump at (e.g. an offer); to snap at; to get one's teeth into; to really get into
その意外とまともな提案に、会長が食いつく。The president jumps at the surprisingly sensible proposal.
3. to hold on to; to cling to; to stick to
どこまでも食いついていくと決めた。I decided to hang on no matter how far it went.
4. to complain; to bicker